Psych Test 2

CHAPTER 5: SENSATION AND PERCEPTION

1. Sensation vs. Perception

• Sensation: The process of detecting physical energy from the environment through sensory receptors.

  • Example: Your eyes detect light.

• Perception: The process of organizing and interpreting sensory information to give it meaning.

  • Example: Your brain recognizes that the light is coming from a car.

Bottom-up processing

• Processing that begins with sensory information and builds toward a complete perception.

• Driven by incoming sensory information.

• Example: Seeing individual lines and shapes and recognizing them as a letter.

Top-down processing

• Processing influenced by prior knowledge, expectations, experiences, and context.

• The brain uses existing knowledge to interpret sensory information.

• Example: Reading a word despite a missing letter because the sentence provides context.

2. Sensory Receptors and Transduction

• Sensory receptors: Specialized cells or nerve endings that detect environmental stimuli.

• Transduction: The conversion of physical energy into electrical or neural signals that the brain can process.

Examples:

• Vision: Light → electrical signals in photoreceptors.

• Hearing: Sound vibrations → electrical signals in hair cells.

• Taste: Chemicals → electrical signals in taste receptor cells.

• Smell: Odor molecules → electrical signals in olfactory receptor neurons.

• Touch: Pressure or temperature → electrical signals in sensory neurons.

3. Psychophysics

The study of the relationship between physical stimuli and psychological experiences.

Absolute threshold

• The minimum intensity of a stimulus that can be detected 50% of the time.

• Example: The quietest sound someone can hear half the time.

Difference threshold (Just Noticeable Difference/JND)

• The smallest difference between two stimuli that a person can detect 50% of the time.

• Example: Noticing that one backpack is slightly heavier than another.

Weber's Law

• The difference needed to notice a change depends on the proportion of the original stimulus.

• The larger the original stimulus, the larger the change needed to notice a difference.

• Example: Adding 1 pound to a 5-pound object is more noticeable than adding 1 pound to a 100-pound object.

4. Sensory Adaptation

• A decrease in sensitivity to a constant, unchanging stimulus over time.

• Allows us to focus on new or changing information.

• Example: You stop noticing the smell of your dorm room after being inside for a while.

5. Perceptual Set and Expectations

• A perceptual set is a mental predisposition to perceive something in a particular way.

• Expectations and previous experiences influence perception.

• Example: Expecting to see a friend in a crowd makes you more likely to interpret someone who looks similar as that friend.

VISION

6. Wavelength and Amplitude

Wavelength

• The distance between corresponding points of consecutive light waves.

• Determines perceived color (hue).

• Short wavelengths = blue/violet.

• Long wavelengths = red.

Amplitude

• The height or intensity of a light wave.

• Determines perceived brightness.

• Greater amplitude = brighter light.

7. Structures of the Eye

Retina

• Light-sensitive layer at the back of the eye.

• Contains rods and cones that convert light into neural signals.

Rods

• Work best in dim lighting.

• Responsible for black-and-white vision.

• Important for peripheral vision.

• Do not provide detailed color vision.

Cones

• Work best in bright lighting.

• Responsible for color vision and fine detail.

• Concentrated in the fovea.

Fovea

• Small central area of the retina with the highest concentration of cones.

• Responsible for sharpest vision.

Photopigments

• Light-sensitive chemicals within rods and cones.

• Absorb light and initiate the process of transduction.

Optic nerve

• Carries visual information from the retina toward the brain.

Blind spot

• The location where the optic nerve exits the retina.

• Contains no rods or cones.

• The brain typically fills in missing information.

8. Color Vision Theories

Trichromatic Theory (Young-Helmholtz)

• The retina contains three types of cones sensitive to different wavelengths.

• Short (blue), medium (green), and long (red) wavelengths.

• Different combinations of cone activity allow us to perceive different colors.

Opponent-Process Theory

• Color vision operates through opposing pairs:

  • Red vs. green

  • Blue vs. yellow

  • Black vs. white

• Helps explain afterimages.

• Example: Staring at a red image and then looking at a white surface may produce a green afterimage.

Important distinction:

• Trichromatic theory explains color processing at the cone level.

• Opponent-process theory explains later color processing through opposing neural channels.

9. Beyond the Retina: Visual Pathway

Basic pathway:

1. Light enters the eye.

2. Photoreceptors (rods and cones) detect light.

3. Signals travel through retinal bipolar and ganglion cells.

4. Ganglion cell axons form the optic nerve.

5. Information travels through the optic chiasm and lateral geniculate nucleus (LGN) of the thalamus.

6. Information reaches the primary visual cortex in the occipital lobe.

Occipital cortex

• The brain's primary visual processing region.

Feature detectors

• Specialized neurons that respond to specific visual features.

• Detect characteristics such as lines, edges, angles, and movement.

10. What vs. Where Pathways

What pathway (ventral stream)

• Processes what an object is.

• Travels toward the temporal lobe.

• Responsible for object recognition.

• Example: Recognizing a dog.

Where pathway (dorsal stream)

• Processes where an object is and how to interact with it.

• Travels toward the parietal lobe.

• Responsible for spatial awareness and movement.

• Example: Reaching out to grab a ball.

11. Depth Perception

The ability to perceive the world in three dimensions and judge distance.

Binocular cues

• Require both eyes.

• Retinal disparity: Each eye receives a slightly different image. The brain compares them to determine depth.

• Convergence: Eyes turn inward when focusing on nearby objects. Greater inward turning indicates a closer object.

Monocular cues

• Require only one eye.

• Relative size: Smaller-looking objects are perceived as farther away when objects are assumed to be similar in actual size.

• Interposition: An object blocking another is perceived as closer.

• Linear perspective: Parallel lines appear to converge in the distance.

• Texture gradient: Textures become finer and less detailed with distance.

• Relative height: Objects higher in the visual field are often perceived as farther away.

• Motion parallax: Nearby objects appear to move faster across your visual field than distant objects as you move.

12. Perceptual Organization: Gestalt Principles

The brain organizes sensory information into meaningful patterns.

• Figure-ground: Separating an object of interest from its background.

• Proximity: Objects close together are perceived as belonging together.

• Similarity: Similar objects are grouped together.

• Continuity: The brain prefers smooth, continuous patterns.

• Closure: The brain fills in missing information to perceive complete objects.

• Connectedness: Objects physically connected are perceived as belonging together.

13. Perceptual Constancy

The ability to perceive objects as remaining consistent despite changes in sensory information.

• Size constancy: Objects appear to maintain the same size despite changes in distance.

• Shape constancy: Objects appear to maintain their shape despite changes in viewing angle.

• Color constancy: Objects appear to maintain their color under different lighting conditions.

• Brightness constancy: Objects appear to maintain brightness despite changes in illumination.

HEARING

14. Frequency and Amplitude

Frequency

• Number of sound wave cycles per second.

• Measured in Hertz (Hz).

• Determines perceived pitch.

• Higher frequency = higher pitch.

• Lower frequency = lower pitch.

Amplitude

• Height or intensity of a sound wave.

• Determines perceived loudness.

• Greater amplitude = louder sound.

15. Structures of the Ear

Outer ear

• Pinna: Visible part of the ear that collects sound waves.

• Auditory canal: Directs sound waves toward the eardrum.

Middle ear

• Tympanic membrane (eardrum): Vibrates when sound waves strike it.

• Ossicles: Three small bones that amplify and transmit vibrations:

  1. Malleus (hammer)

  2. Incus (anvil)

  3. Stapes (stirrup)

• Oval window: Membrane that receives vibrations from the stapes and transfers them into the inner ear.

Inner ear

• Cochlea: Fluid-filled, spiral-shaped structure responsible for hearing.

• Basilar membrane: Vibrates in response to sound and contains the organ of Corti.

• Hair cells: Sensory receptor cells that bend in response to movement of the basilar membrane.

• Auditory nerve: Carries electrical signals to the brain.

Where does transduction occur?

Transduction occurs in the hair cells of the organ of Corti inside the cochlea.

Sound vibrations → movement of cochlear fluid → movement of basilar membrane → bending of hair cells → electrical signals → auditory nerve → brain.

16. Frequency Theory vs. Place Theory

Frequency Theory

• Pitch is determined by the frequency at which auditory neurons fire.

• Best explains lower-frequency sounds.

• Neural firing patterns correspond to sound frequency.

Place Theory

• Pitch is determined by the location along the basilar membrane where vibration is strongest.

• High frequencies stimulate the area closest to the oval window.

• Low frequencies stimulate the area farther from the oval window, near the apex of the cochlea.

Remember:

• High pitch = near oval window.

• Low pitch = far from oval window.

17. Sound Localization

The ability to determine where a sound is coming from.

• Interaural time difference: Sound reaches one ear slightly before the other.

• Interaural intensity difference: Sound is louder in the ear closer to its source.

The brain compares information from both ears to determine sound location.

18. Hearing Loss

Conductive hearing loss

• Caused by problems transmitting sound through the outer or middle ear.

• Examples: Earwax buildup, damaged eardrum, or problems with ossicles.

• Sound cannot efficiently reach the inner ear.

Sensorineural hearing loss

• Caused by damage to the cochlear hair cells or auditory nerve.

• Often associated with aging, loud noise, or disease.

• May be permanent.

TOUCH

19. Four Skin Senses

1. Pressure: Detects physical pressure against the skin.

2. Warmth: Detects increases in temperature.

3. Cold: Detects decreases in temperature.

4. Pain: Detects potentially damaging stimuli.

These senses use specialized sensory receptors in the skin.

20. Pain and Biological Influences

Pain is a complex experience influenced by biological, psychological, and social factors.

Biological influences

• Nociceptors detect potentially damaging stimuli.

• Signals travel through the spinal cord to the brain.

• The brain processes and interprets pain.

• Endorphins are natural pain-relieving chemicals produced by the body.

Gate-control theory

• The spinal cord contains neural mechanisms that can increase or decrease pain signals traveling to the brain.

• Rubbing an injured area can reduce pain because touch signals can help inhibit pain transmission.

• Psychological factors such as attention and emotions also influence pain.

TASTE

21. Taste and Its Adaptive Function

Taste helps organisms identify nutrients and potentially harmful substances.

Five basic tastes:

1. Sweet: Often indicates energy-rich foods.

2. Salty: Indicates minerals and electrolytes.

3. Sour: Can indicate acidity or spoiled food.

4. Bitter: Can warn against potentially toxic substances.

5. Umami: Savory taste associated with amino acids and protein-rich foods.

Adaptive aspect: Taste helps organisms choose nutritious foods and avoid potentially dangerous substances.

22. Papillae, Taste Buds, and Receptors

Papillae

• Small structures on the tongue that give it a textured appearance.

• Some papillae contain taste buds.

Taste buds

• Collections of taste receptor cells.

• Detect chemicals dissolved in saliva.

Taste receptor cells

• Detect chemicals associated with the five basic tastes.

• Transmit information to sensory neurons, which carry signals to the brain.

Important distinction:

• Papillae are structures on the tongue.

• Taste buds contain taste receptor cells.

• Taste receptor cells detect dissolved chemicals.

SMELL

23. Olfaction (Smell)

Smell is considered a primitive sense because it has strong connections to brain areas involved in emotion and memory.

Olfactory epithelium

• Specialized tissue located high inside the nasal cavity.

• Contains olfactory receptor neurons.

Olfactory receptors

• Detect airborne chemical molecules (odorants).

• Convert chemical information into neural signals.

Olfactory bulb

• Receives information from olfactory receptor neurons.

• Begins processing smell information.

Pathway

1. Odor molecules enter the nasal cavity.

2. They interact with receptors in the olfactory epithelium.

3. Signals travel to the olfactory bulb.

4. Information travels to brain regions including the piriform cortex, amygdala, and entorhinal cortex.

Why is smell primitive?

• Olfactory information has relatively direct connections to areas involved in emotion and memory.

• Explains why certain smells can trigger strong emotional memories.

KINESTHESIA AND VESTIBULAR SENSE

24. Kinesthesia

• The sense of the position and movement of individual body parts.

• Uses receptors in muscles, tendons, and joints.

• Example: Closing your eyes and still knowing where your arm is.

25. Vestibular Sense

• Sense of balance and spatial orientation.

• Located in the inner ear.

• Uses the semicircular canals and vestibular sacs.

• Detects head movement, rotation, and acceleration.

• Helps maintain balance and posture.

Kinesthesia vs. Vestibular

• Kinesthesia = position and movement of body parts.

• Vestibular = balance and movement of the head/body through space.

26. Embodied Cognition

• The idea that thinking and cognition are influenced by bodily experiences, physical actions, and sensory systems.

• The mind and body work together rather than functioning independently.

• Example: Physically moving through space can influence how we think about distance or direction.

CHAPTER 12: PERSONALITY

1. Major Personality Theories

2. Psychodynamic Perspective

• Personality is influenced by unconscious motives, conflicts, and early childhood experiences.

• Unconscious thoughts and desires can influence behavior without our awareness.

Freud's Psychoanalytic Theory

Freud believed personality was strongly influenced by sexual and aggressive drives and unconscious conflicts.

Three parts of personality

Id

• Present from birth.

• Operates according to the pleasure principle.

• Seeks immediate gratification.

• Impulsive and driven by desires.

Example: Eating an entire pizza because you're hungry.

Ego

• Operates according to the reality principle.

• Balances the id's desires with real-world consequences.

• Attempts to satisfy the id in socially acceptable ways.

Example: Waiting until lunch to eat instead of interrupting class.

Superego

• Represents internalized morals, values, and standards.

• Acts like a conscience.

• Encourages morally appropriate behavior.

Example: Feeling guilty about cheating on an exam.

Remember:

• Id = wants.

• Ego = reality.

• Superego = morality.

3. Defense Mechanisms

Unconscious strategies the ego uses to protect itself from anxiety and psychological conflict.

Repression

• Pushing threatening or painful thoughts out of conscious awareness.

• Example: Being unable to consciously remember a traumatic experience.

Rationalization

• Creating a seemingly logical explanation to justify unacceptable behavior or failure.

• Example: Saying you didn't want the scholarship anyway after being rejected.

Reaction formation

• Expressing the opposite of one's true feelings.

• Example: Acting overly friendly toward someone you secretly dislike.

Denial

• Refusing to accept an unpleasant reality.

• Example: Someone refusing to believe they have an alcohol problem despite clear evidence.

4. Projective Tests

Personality assessments that present ambiguous stimuli and ask individuals to interpret them.

Rorschach Inkblot Test

• Individuals interpret ambiguous inkblots.

• Historically intended to reveal unconscious thoughts and conflicts.

Thematic Apperception Test (TAT)

• Individuals create stories about ambiguous pictures.

• Responses are interpreted for underlying motives, needs, and concerns.

5. Modern Unconscious Mind

• Modern psychology recognizes that many mental processes occur outside conscious awareness.

• Examples include automatic habits, implicit attitudes, and unconscious information processing.

• Unlike Freud's emphasis on hidden sexual and aggressive drives, modern research focuses on a broader range of unconscious processes.

HUMANISTIC PERSPECTIVE

6. Maslow

Self-actualizing tendency

• The drive to develop one's potential and become the best version of oneself.

Hierarchy of Needs

1. Physiological: Food, water, sleep.

2. Safety: Security and protection.

3. Love and belonging: Relationships and connection.

4. Esteem: Confidence, achievement, and respect.

5. Self-actualization: Reaching one's potential.

Flow

• A state of complete absorption in an activity.

• Occurs when the challenge of a task is well matched to one's skill level.

• Example: Being so focused on studying, sports, or playing an instrument that you lose track of time.

7. Carl Rogers

Rogers emphasized personal growth, acceptance, and the importance of a supportive environment.

Unconditional positive regard

• Accepting and valuing someone regardless of their actions or mistakes.

• Acceptance is not dependent on performance.

Genuineness

• Being honest, authentic, and genuine in relationships.

Empathy

• Understanding another person's feelings and experiences from their perspective.

Self-concept

• The way a person views and understands themselves.

• Includes beliefs about abilities, personality, and identity.

Rogers believed that acceptance and supportive relationships help people develop a healthy self-concept and reach their potential.

TRAIT THEORIES

8. Traits

• Relatively stable characteristics that influence how a person thinks, feels, and behaves.

• Traits can help predict behavior across situations, although behavior also depends on circumstances.

Example: Someone who scores high in conscientiousness is generally organized and responsible.

9. MMPI

Minnesota Multiphasic Personality Inventory

• A standardized personality assessment.

• Uses self-report questions.

• Primarily used to assess psychological symptoms and personality patterns.

• Includes validity scales to identify potentially inconsistent or unusual response patterns.

10. Big Five Personality Traits (OCEAN)

O – Openness

• Creativity, curiosity, imagination, and willingness to try new experiences.

C – Conscientiousness

• Organization, responsibility, discipline, and dependability.

E – Extraversion

• Sociability, assertiveness, and positive emotional expression.

A – Agreeableness

• Cooperation, kindness, trust, and compassion.

N – Neuroticism

• Tendency toward negative emotions such as anxiety, sadness, and emotional instability.

11. Person-Situation Controversy

• Debate over whether personality traits or situational factors better predict behavior.

• Traits influence behavior, but situations can also significantly change how someone acts.

Example:

• A normally outgoing person may become quiet during a formal job interview.

Main takeaway: Behavior is influenced by both personality and the situation.

SOCIAL-COGNITIVE PERSPECTIVE

12. Reciprocal Determinism

• Albert Bandura's idea that personality and behavior result from the interaction of three factors:

  1. Personal factors (thoughts, beliefs, feelings).

  2. Behavior (actions).

  3. Environment (surroundings and situations).

Each factor influences the others.

Example:

• A confident student participates in class.

• Positive feedback from the environment increases confidence.

• Increased confidence encourages more participation.

13. Assessing Behavior in Actual Situations

• Social-cognitive psychologists emphasize observing behavior in real-world situations.

• They believe personality cannot always be understood through questionnaires alone.

• Actual behavior and environmental influences matter.

14. Self-Esteem

• Overall evaluation of one's own worth or value.

• How positively or negatively someone views themselves.

15. Self-Efficacy

• Belief in one's ability to successfully perform a specific task or achieve a goal.

• Example: Believing you can earn an A in chemistry because you have the skills and preparation.

Self-esteem vs. self-efficacy

• Self-esteem = How much you value yourself.

• Self-efficacy = How capable you believe you are at a particular task.

16. Narcissism

• Excessive self-focus and an inflated sense of self-importance.

• Often involves a strong need for admiration and recognition.

17. Self-Serving Bias

• The tendency to attribute successes to internal factors and failures to external factors.

• Example:

  • Success: "I got an A because I'm intelligent."

  • Failure: "I failed because the exam was unfair."

18. Cultural Differences

Individualism

• Emphasizes personal goals, independence, and individual achievement.

• More commonly emphasized in Western cultures, including the United States.

Collectivism

• Emphasizes group goals, cooperation, family, and social harmony.

• More commonly emphasized in many East Asian and other group-oriented cultures.

CHAPTER 7: MEMORY

1. Three Basic Memory Processes

Encoding

• Getting information into memory.

• Example: Learning a definition in psychology.

Storage

• Maintaining information over time.

• Example: Retaining the definition for several weeks.

Retrieval

• Accessing stored information when needed.

• Example: Remembering the definition during an exam.

2. Three Levels of Memory

3. Sensory Memory

• The initial, brief storage of sensory information.

Iconic memory

• Visual sensory memory.

• Lasts approximately a fraction of a second.

• Example: Briefly seeing an image after it disappears.

Echoic memory

• Auditory sensory memory.

• Lasts several seconds.

• Example: Remembering the last few words someone said even after they finish speaking.

4. Short-Term and Working Memory

Short-term memory

• Temporarily holds a limited amount of information.

Working memory

• Actively holds and manipulates information.

• Example: Mentally calculating 25 × 4.

Improving Short-Term Memory

Rehearsal

• Repeating information to keep it in memory.

• Example: Repeating a phone number.

Chunking

• Grouping information into meaningful units.

• Example: Remembering 194520262000 instead of 12 individual digits.

Spacing Effect

• Learning is more effective when studying is distributed over multiple sessions rather than crammed into one session.

Testing Effect

• Retrieving information through practice tests improves long-term retention.

• Actively recalling information is often more effective than repeatedly rereading it.

5. Long-Term Memory

• Relatively permanent storage of information.

• Has a very large capacity.

Explicit (Declarative) Memory

• Conscious memory of facts and experiences.

• Strongly associated with the hippocampus for the formation and consolidation of new memories.

Semantic memory

• General knowledge, facts, and concepts.

• Example: Knowing that Iowa is a state.

Episodic memory

• Personal experiences and events.

• Example: Remembering your first day of college.

Implicit (Nondeclarative) Memory

• Memory that influences behavior without conscious recollection.

Procedural memory

• Memory for learned skills and actions.

• Example: Riding a bicycle.

Cerebellum

• Important for procedural learning and certain conditioned motor responses.

Other implicit memories

• Priming and conditioned emotional or physiological responses also involve implicit memory systems.

6. Emotional Memories

• Emotionally significant experiences can create strong memories.

• The amygdala plays an important role in emotional memory processing.

• Emotional arousal can strengthen memory consolidation.

Flashbulb memories

• Vivid, detailed memories of emotionally significant events.

• Example: Remembering where you were when you heard major news.

• They feel extremely accurate, but they are not necessarily more accurate than ordinary memories.

7. Synaptic Changes and Long-Term Potentiation (LTP)

Long-term potentiation

• A long-lasting strengthening of connections between neurons following repeated stimulation.

• Important biological mechanism involved in learning and memory.

• Repeated activation makes neural communication more efficient.

RETRIEVAL

8. Retrieval Cues

• Stimuli that help bring stored information into conscious awareness.

• Example: Seeing a picture reminds you of a past vacation.

Priming

• Exposure to one stimulus influences your response to another stimulus.

• Often occurs without conscious awareness.

• Example: Seeing the word doctor makes you recognize the word nurse more quickly.

9. Context-Dependent Memory

• Recall improves when the environment at retrieval matches the environment where learning occurred.

• Example: Remembering information more easily in the same classroom where you studied it.

10. State-Dependent Memory

• Recall improves when your internal physical or physiological state at retrieval matches the state during learning.

• Example: Information learned while in a particular physiological state may be easier to recall when in that same state.

11. Mood-Congruent Memory

• The tendency to recall experiences that match your current mood.

• Example: When sad, you are more likely to remember other sad experiences.

12. Serial Position Effect

• The tendency to remember the first and last items in a list better than the middle items.

Primacy Effect

• Better memory for the first items.

• Often because those items receive more rehearsal and enter long-term memory.

Recency Effect

• Better memory for the last items.

• Often because they remain in short-term/working memory.

FORGETTING

13. Decay Theory

• Memories may fade over time when they are not accessed or used.

• Associated with weakening memory traces.

14. Amnesia

A significant loss or impairment of memory.

Retrograde amnesia

• Loss of memories formed before the event that caused amnesia.

• Example: Someone cannot remember the days leading up to a car accident.

Anterograde amnesia

• Difficulty forming new long-term memories after the event that caused amnesia.

• Example: Someone remembers childhood but cannot form lasting memories of new experiences.

Remember:

• Retrograde = past memories lost.

• Anterograde = difficulty creating new memories.

15. Retrieval Failure

• Information is stored in memory but cannot currently be accessed.

• Example: Experiencing the tip-of-the-tongue phenomenon.

16. Interference

Proactive interference

• Old information interferes with learning or remembering new information.

• Example: You keep entering your old password instead of your new password.

Retroactive interference

• New information interferes with remembering old information.

• Example: Learning a new phone number makes it harder to remember your previous number.

17. Motivated Forgetting

• Forgetting or avoiding memories because they are emotionally uncomfortable or threatening.

• Historically associated with psychoanalytic repression.

• Modern research recognizes that motivated forgetting can involve intentional suppression and other memory-control processes.

18. Reconstruction Errors

• Memories are reconstructed rather than replayed exactly.

• Expectations, knowledge, and beliefs can distort what we remember.

• Example: Remembering an event differently after hearing someone else's version.

19. Reconsolidation

• When a retrieved memory becomes temporarily unstable and can be modified before being stored again.

• New information or experiences can alter an existing memory when it is reconsolidated.

20. Misinformation Effect

• When misleading information introduced after an event changes a person's memory of that event.

• Example: Asking someone how fast cars were going when they "smashed" into each other may lead them to remember a more severe accident than actually occurred.

21. Source Amnesia (Source Monitoring Error)

• Remembering information but forgetting where it came from.

• Example: Remembering a fact but mistakenly believing you learned it from your professor when you actually saw it online.

22. False Memories

• Memories of events that did not actually occur or memories containing significant inaccuracies.

• Can be influenced by suggestion, imagination, misinformation, and expectations.

23. Improving Memory

1. Rehearsal: Repeat important information.

2. Connect to known information: Relate new material to concepts you already understand.

3. Retrieval cues: Create meaningful associations that help you remember.

4. Test yourself: Practice active recall and retrieval.

5. Spacing: Distribute studying over multiple sessions.

6. Sleep: Sleep supports memory consolidation.

7. Chunking: Group information into meaningful units.

8. Elaborative rehearsal: Explain why and how information connects to other concepts.

CHAPTER 8: THINKING, LANGUAGE, AND INTELLIGENCE

THINKING

1. Concepts and Prototypes

Concept

• A mental category used to organize similar objects, ideas, or experiences.

• Example: The concept of a bird.

Prototype

• The most typical or representative example of a particular category.

• Example: A robin might be someone's prototype of a bird.

Prototypes help us quickly categorize information.

2. Problem Solving and Reasoning

Problem solving

• The process of identifying a problem and finding a solution.

Reasoning

• Using information and logical thinking to reach conclusions.

3. Algorithms

• Step-by-step procedures that guarantee a correct solution when followed correctly and when applicable.

• Usually more reliable but can be time-consuming.

• Example: Following a mathematical formula to solve an equation.

4. Heuristics

• Mental shortcuts used to make judgments or solve problems quickly.

• Faster than algorithms but more likely to produce errors.

Representativeness Heuristic

• Judging the likelihood of something based on how closely it resembles a typical example or stereotype.

• Example: Assuming someone is a librarian because they are quiet and enjoy reading, without considering how common different occupations are.

Availability Heuristic

• Judging the likelihood of an event based on how easily examples come to mind.

• Example: Thinking airplane crashes are common after seeing several news stories about them.

Remember:

• Representativeness = Similarity to a typical example.

• Availability = How easily an example comes to mind.

5. Fixation

• An obstacle to problem solving caused by an inability to see a problem from a new perspective.

Examples:

Mental set

• The tendency to approach problems using strategies that worked previously, even when better strategies exist.

Functional fixedness

• The inability to recognize that an object can be used for something other than its typical purpose.

Example: Not realizing a shoe can be used to hammer a nail.

6. Framing

• The way information is presented influences decisions and judgments.

• The same information can produce different decisions depending on how it is worded.

Example:

• "90% survival rate" sounds more appealing than "10% mortality rate," even though they communicate the same statistic.

7. Intuition

• Quick, automatic judgments or decisions that occur without deliberate reasoning.

• Can be useful when based on experience but can also produce biases and mistakes.

8. Comparative Studies: Cognition in Other Species

• Animals demonstrate cognitive abilities such as memory, problem solving, learning, and decision-making.

• Different species show different cognitive strengths.

• Examples:

  • Chimpanzees use tools and solve problems.

  • Crows can use tools and complete complex tasks.

  • Dogs can learn commands and interpret human social cues.

• Studying animals helps psychologists understand the evolution of cognition.

LANGUAGE

9. Language

• A system of communication using symbols, sounds, and rules to express thoughts and ideas.

Syntax

• Rules governing how words are arranged into sentences.

Grammar

• The broader system of rules governing language, including syntax and word structure.

Example:

• "The dog chased the ball" follows English syntax.

• "Dog the ball chased" does not follow standard English word order.

10. Critical Periods

• A developmental window during which the brain is especially receptive to acquiring certain abilities.

• Language acquisition is generally easier during childhood.

• Early exposure to language is especially important for developing normal language abilities.

• Severe deprivation during early development can lead to lasting language difficulties.

11. Broca's Area vs. Wernicke's Area

Broca's Area

• Located in the frontal lobe, typically in the left hemisphere.

• Responsible for language production and speech planning.

• Damage can cause Broca's aphasia:

  • Slow, difficult, effortful speech.

  • Comprehension is relatively preserved.

Wernicke's Area

• Located in the posterior temporal region, typically in the left hemisphere.

• Important for language comprehension.

• Damage can cause Wernicke's aphasia:

  • Fluent but often meaningless or nonsensical speech.

  • Poor language comprehension.

Remember:

• Broca = Production.

• Wernicke = Comprehension.

12. Comparative Studies: Language in Other Species

• Animals communicate through sounds, gestures, and signals.

• Some animals can learn symbolic communication systems.

• Examples:

  • Chimpanzees have learned sign-based or symbol-based communication systems.

  • Dolphins use complex vocalizations.

  • Bees communicate food locations through the waggle dance.

• Animal communication demonstrates sophisticated abilities but does not necessarily involve the same complexity and generativity as human language.

13. Linguistic Determinism (Whorfian Hypothesis)

• The idea that language influences how people think and perceive the world.

• Strong linguistic determinism suggests language determines thought.

• A weaker interpretation, linguistic relativity, suggests language influences thought without completely determining it.

Example:

• Differences in the words used to describe colors may influence how people categorize or remember colors.

INTELLIGENCE

14. General Intelligence (g)

• Charles Spearman proposed that intelligence includes a general mental ability that influences performance across different cognitive tasks.

• People who perform well in one cognitive area often perform well in others.

15. Howard Gardner: Multiple Intelligences

Gardner proposed that intelligence consists of several relatively distinct abilities rather than one general ability.

Commonly described intelligences:

1. Linguistic: Ability with language and words.

2. Logical-mathematical: Reasoning and numerical problem solving.

3. Spatial: Understanding visual and spatial relationships.

4. Musical: Understanding rhythm, pitch, and music.

5. Bodily-kinesthetic: Using the body skillfully.

6. Interpersonal: Understanding other people.

7. Intrapersonal: Understanding oneself.

8. Naturalistic: Recognizing and categorizing patterns in nature.

Important: Gardner's theory is influential but is not universally accepted as a scientifically established model of intelligence.

16. Robert Sternberg: Triarchic Theory

Three types of intelligence:

Analytical intelligence

• Ability to analyze, evaluate, and solve academic problems.

• Example: Solving a difficult chemistry problem.

Creative intelligence

• Ability to develop new ideas and approach unfamiliar situations.

• Example: Creating an original solution to a problem.

Practical intelligence

• Ability to handle everyday problems and adapt to real-world situations.

• Example: Managing a difficult social situation.

17. Emotional Intelligence

• The ability to recognize, understand, manage, and respond appropriately to emotions.

• Includes recognizing your own emotions and understanding the emotions of others.

Examples:

• Managing frustration during an exam.

• Recognizing when a friend is upset.

• Responding appropriately during conflict.

18. Intelligence Tests

Stanford-Binet Intelligence Test

• One of the earliest standardized intelligence tests.

• Historically associated with the concept of mental age.

• Originally used mental age and chronological age to calculate IQ.

Traditional IQ formula:

IQ = (Mental Age ÷ Chronological Age) × 100

Example:

• Mental age = 12.

• Chronological age = 10.

• IQ = (12 ÷ 10) × 100 = 120.

Modern versions use standardized scores based on age-based norms rather than relying on this original formula.

Wechsler Adult Intelligence Scale (WAIS)

• A widely used standardized intelligence test for adults.

• Measures several cognitive abilities, including:

  • Verbal comprehension.

  • Perceptual reasoning/visual-spatial abilities.

  • Working memory.

  • Processing speed.

19. Heritability and Gene-Environment Interactions

Heritability

• A statistical estimate of how much variation in a trait within a particular population is associated with genetic differences.

• Does not tell you what percentage of an individual's intelligence is genetic.

• Heritability can change depending on the population and environment.

Gene-environment interaction

• Genes and environmental experiences influence each other in shaping intelligence.

• Examples of environmental influences:

  • Education.

  • Nutrition.

  • Family environment.

  • Access to learning opportunities.

  • Socioeconomic conditions.

20. Stability of Intelligence Across the Lifespan

• Intelligence is relatively stable over time, especially when measured as a person's standing compared with others.

• However, different types of cognitive abilities can change as people age.

• Experience, education, health, and environment influence cognitive development.

21. Fluid vs. Crystallized Intelligence

Fluid intelligence

• Ability to solve new problems, recognize patterns, and reason without relying heavily on previously learned knowledge.

• Example: Solving a new logic puzzle.

• Tends to decline with age, particularly later in adulthood.

Crystallized intelligence

• Accumulated knowledge, facts, vocabulary, and skills gained through experience and education.

• Example: Knowing historical facts or understanding advanced vocabulary.

• Often remains stable or increases with age.