ThompsonCramPacketNewCurriculum2025 (1)

Unit Zero – Research Design

  • CORRELATION: identifies relationships between two variables.
  • EXPERIMENTS: manipulates variables to determine cause/effect.
  • NATURALISTIC OBSERVATION: observes people in their natural settings.
  • CASE STUDY: studies one person (usually) in great detail.
  • META-ANALYSIS: combines multiple studies to increase sample size and examine effect sizes.

Basic Vocabulary

  • Hypothesis: A tentative explanation that must be falsifiable (able to be supported or rejected).
  • Operational Definition: Clear, precise, quantifiable definition of variables, allowing replication and reliable data collection.
  • Qualitative data: Descriptive data (e.g., eye color).
  • Quantitative data: Numerical data, ideal and necessary for statistics.
  • Population: Everyone the research could apply to.
  • Sample: The people (or person) specifically chosen for your study.

Research Designs

  • Advantage: Useful when experiments are unethical.
  • Disadvantage: Correlation does not equal causation.
    • Directionality Problem: Which direction does the correlation go? (e.g., does depression cause low self-esteem, or vice versa, or is there a third variable?).
    • 3rd Variable Problem: A different variable is responsible for the relationship (e.g., ice cream sales and murder rates).
    • Positive Correlation: Variables increase and decrease together.
    • Negative Correlation: As one variable increases, the other decreases.
    • The stronger the number, the stronger the relationship, regardless of the +/- sign. Correlation cannot be less than or greater than 1.
    • Stronger relationships = tighter clusters on a graph.

Experiments

  • Advantage: Only type that establishes cause and effect.
  • Disadvantage: Can be unethical, too artificial.
    • Independent Variable: Purposefully altered by the researcher to look for an effect.
      • Experimental Group: Receives the treatment (part of the IV); can have multiple experimental groups.
      • Control Group: Placebo, baseline (part of the IV); can only have one control group.
    • Dependent Variable: Measured variable (dependent on the independent variable).

Vocabulary Unique to Experiments

  • Placebo Effect: Any observed effect on behavior that is “caused” by the placebo (shows the effectiveness of experimental treatment). Usually fixed with blinded studies.
  • Double-Blind: Experiment where neither the participant nor the experimenter is aware of which condition people are assigned to (e.g., drug studies).
  • Single-Blind: Only the participant is blind, used if the experimenter can’t be blind (e.g., gender, age).
  • Confound: Error/flaw in the study that is accidentally introduced (can be called a confounding variable).
  • Random Assignment: Assigns participants to either the control or experimental group at random, increasing the chance of equal representation among groups (spreads the lefties across both groups), allows determination of cause/effect.

Other Study Types

  • Naturalistic Observation
    • Advantage: Real-world validity.
    • Disadvantage: No cause and effect.
  • Case Study
    • Advantage: Collect lots of information.
    • Disadvantage: No cause/effect.

Statistics

  • Descriptive Stats: Show the shape of the data.
    • Measures of Central Tendency:
      • Mean: Average (use in normal distribution).
      • Median: Middle # (use in skewed distribution).
      • Mode: Occurs most often.
        • Bimodal: Has two modes, usually indicates good and bad scores.
      • Skews: Created by outliers.
        • Negative Skew: Mean is to the left (negative side), mode is to the right.
        • Positive Skew: Mean is to the right.
    • Measure of Variation:
      • Range: Distance between the smallest and biggest number.
      • Standard Deviation: Average amount the scores are spread from the mean (bigger # = more spread).
  • Inferential Statistics: Establishes significance (meaningfulness).
    • Statistical Significance: Results not due to chance; experimental manipulation caused the difference in means.
      • p < .05 = stat. sig, smaller = better.
    • Effect Size: Data has practical significance – bigger = better.

Ethical Guidelines (IRB Approval Needed for People)

  • Confidentiality: Names kept secret.
  • Informed Consent: Must agree to be part of the study.
  • Informed Assent: Minors AND their parents must agree.
  • Debriefing: Must be told the true purpose of the study (done after for deception).
  • Deception: Must be warranted.
  • No Harm: Mental/physical.

Additional Vocabulary

  • Surveys: Usually turned into correlation. Subject to self-report bias - errors when collecting survey data due to:
    • Social Desirability: People lie to look good.
    • Wording Effects: How you frame the question can impact your answers.
  • Random Sample (Selection): Method for choosing participants for your study – everyone has a chance to take part; increases generalizability.
  • Representative Sample: Sample mimics the general population (ethnic, gender, age).
  • Convenience Sample: Select participants on availability – less representative and less generalizability this way.
  • Sampling Bias: Sample isn’t representative, due to conv. sampling.
  • Cultural Norms: Behaviors of a particular group can influence research results.
  • Experimenter Bias / Participant Bias: Experimenter/participant expectations influence the outcome.
  • Cognitive Bias: Bias in thinking/judgment.
    • Confirmation Bias: Find info that supports our preexisting beliefs.
    • Hindsight Bias: “I knew it all along.”
    • Overconfidence: Overestimate our knowledge/abilities.
    • Hawthorne effect: People change behavior when watched.
  • Research needs peer review and adequate sample sizes.

Biological Basis Pillar

  • NT = neurotransmitter, AP = action potential, NS = nervous system
  • Heredity vs. Environment
    • Evolutionary psychs: Study how natural selection influences behavior
    • Heredity (nature) = how genes influence your behavior
    • Environment (nurture) = how outside situations influence your behavior (school)
    • NATURE VS. NURTURE: ANSWER IS BOTH
      • Twin / Adoption Studies:
        • Genetics: identical twin will have a higher percentage of also developing a disease
        • Environment: identical twins raised in different environments show differences.

Nervous System

  • CENTRAL NS: Brain and spinal cord
  • PERIPHERAL NS: Rest of the NS – relays to Central NS
    • Somatic NS: Voluntary movement, has sensory and motor neurons
    • Autonomic NS: Involuntary organs (heart, lungs, etc) – contains the:
      • Sympathetic NS: fight/flight (generally activates – exception digestion)
      • Parasympathetic NS: rest / digest (generally inhibits - exception digestion)

Neuron and Neural Firing

  • NEURON: Basic cell of the NS
    • Dendrites: Receive incoming NTs
    • Axon: AP travels down this
    • Myelin Sheath: Speeds up AP down axon, protects axon
    • Synapse: Gap b/w neurons
  • SENSORY neurons: Receive sense signals from environ. – send signal to brain
  • MOTOR neurons: Send signals to move – send signals from brain
  • Interneurons: Cells in spinal cord /brain responsible for reflex arc
    • Reflex arc: Important stimuli skips the brain and routes through the spinal cord for immediate reactions (hand on a hot flame)
  • GLIA: Support cells – give nutrients and clean up around neurons
  • Neurons Fire w/ an Action Potential: ions move across membrane sends an electrical charge down the axon
    • Resting potential: neuron maintains a −70mv charge when not doing anything
    • Depolarization: charge of neuron briefly switches from neg to pos. – triggers the AP
    • Threshold of depolarization: stimulus strength must reach this point to start the AP
    • All or nothing principle: stimulus must trigger the AP past its threshold, but does not increase the intensity or speed of the response (flush the toilet)
    • Refractory period: neuron must rest and reset before it can send another AP (toilet resets)

Neurotransmitters (NT)

  • Chemicals released in synaptic gap, received by neurons. Classified as excitatory (increase APs in other neurons) or inhibitory (decrease APs)
    • GABA: Major inhibitory NT
    • Glutamate: Major excitatory NT (glutes excite you!)
    • Dopamine: Reward (short term) & fine movement – in hypothalamus, assoc. w/ addiction
    • Serotonin: Moods (long-term), emotion, sleep –in amygdala, too little assoc. w/ depression
    • Acetylcholine (ACh): Memory and movement –in hippocampus, assoc. w/ Alzheimer’s
    • Norepinephrine: sympathetic NS - too little assoc. w/ depression
    • Endorphins: decrease pain
    • Substance P: pain regulation (abnormality increases pain and inflammation)

Hormones

  • If not in the nervous system, it’s a hormone
    • Oxytocin: love, bonding, childbirth, lactation
    • Adrenaline: fight/flight
    • Leptin: makes you full (stops hunger)
    • Ghrelin: makes you hungry (turns you into a gremlin)
    • Melatonin: sleep
  • Agonist: drug that mimics a NT
  • Antagonist: drug that blocks a NT
  • Reuptake: Unused NTs are taken back up into the sending neuron.(antidepressants cause reuptake inhibition (block reuptake) – treatment for depression)

Psychoactive Drugs

  • Depressants: Decrease NS activity (alcohol)
  • Stimulants: Increase NS activity (caffeine & cocaine)
  • Hallucinogens: hallucinations and altered perceptions (Marijuana)
  • Opioids: relieve pain (endorphin agonists) (heroin)
  • Tolerance: Needing more of a drug to achieve the same effects
  • Addiction: must have it to avoid withdrawal symptoms
  • Withdrawal: symptoms associated with sudden stoppage

The Brain

  • Cerebellum: movement, balance, coordination, procedural memory (walking a tightrope balancing a bell)
  • Brainstem/Medulla: vital organs (HR, BP, breathing)
  • Reticular activating system: alertness, arousal, sleep, eye movement
  • Cerebral Cortex: outer portion of the brain – higher order thought processes – includes limbic system, lobes, corpus callosum
    • Limbic System
      • Amygdala: emotions, fear
      • Hippocampus: episodic and semantic memory (if you saw a hippo on campus you’d remember it!)
      • Hypothalamus: Reward/pleasure center, eating behaviors – link to endocrine system, homeostasis
      • Thalamus: relay center for all but smell
      • Pituitary gland: talks w/ endocrine sys and hypothalamus – release hormones
    • Occipital Lobe: vision
    • Frontal Lobe: decision making, planning, judgment, movement, personality, language, executive function – includes the:
      • Prefrontal cortex: front of frontal lobe – executive function
      • Motor Cortex: back of frontal lobe - map of our motor receptors – controls skeletal movement
    • Parietal Lobe: sensations and touch – controls association areas – incudes:
      • Somatosensory Cortex: map of our touch receptors
    • Temporal Lobe: hearing and face recognition, language

Brain Continued

  • Association areas: receive input from multiple areas / lobes to integrate info
  • Left hemisphere only – damage to these results in aphasia (damaged speech)
    • Broca’s Area: Inability to produce speech (Broca – Broken speech)
    • Wernicke’s Area: can’t comprehend speech (Wernicke’s what?)
  • Corpus Callosum: bundle of nerves that connects the 2 hemispheres – sometimes severed in patients with severe seizures – leads to “split-brain patients”
    • Split-brain experiments:
      • Image shown to R eye processed in L hemi – patient can say what they saw; image shown to L eye processed in R hemi, can’t say what was seen
  • BRAIN PLASTICITY: Brain changes via damage and through experience
  • ENDOCRINE SYSTEM: sends hormones throughout the body
    • Pituitary Gland: Controlled by hypothalamus. release growth hormones

Brain Research

  • EEG: shows broad brain activity – not specific – electrical output
  • fMRI: show brain activity in specific regions, measures oxygen
  • Lesion: destruction of brain tissue

Diseases & Disorders to Know

  • Multiple sclerosis: destruction of myelin sheath, disrupts APs, causes impaired mobility, paralysis, pain
  • Myasthenia gravis: acetylcholine blocked, disrupts APs, causes poor motor control and paralysis
  • Blindsight: caused by lesions to primary visual cortex, ppl can “see” ie catch a ball etc despite being blind – evidence for association areas
  • Prosopagnosia: face blindness – damage to occipital and/or temporal lobe
  • Broca’s aphasia: damage to Broca’s area – stuttered speech
  • Wernicke’s aphasia: damage to Wernicke’s – jumbled speech
  • Phantom limb pain: pain from a limb that no longer is there (amputated) – caused by brain plasticity
  • Epilepsy: seizures – too much / little Glutamate / GABA
  • Alzheimer’s: destruction of acetylcholine in hippocampus, memory loss

Sleep

  • Consciousness: awareness of cognitive processes (asleep or awake?)
  • Circadian Rhythms: 24ish hour biological clock of Body temp & sleep
    • Disrupting it makes your internal clock get out of sync (jet lag and shift work do this)
  • Beta Waves: awake (you betta be awake for the exam)
  • Alpha Waves: high amp., drowsy
  • NREM (non REM) stages-
    • NREM 1: light sleep, has hypnagogic sensations (falling feeling)
    • NREM 2: bursts of sleep spindles
    • NREM 3 Delta waves: Deep sleep
  • Rapid Eye Movement (REM): dreaming, cognitive processing
  • Entire cycle takes 90 minutes, REM occurs inb/w each cycle. REM lasts longer throughout the night, deep sleep decreases
  • REM is “paradoxical” bc your HR and brain is active – but your body is relaxed
  • REM Rebound: after sleep disruptions and/or lack of REM sleep you’ll have more / more intense REM sleep

Dream Theories

  • Activation Synthesis: Brain produces random bursts of energy – stimulating lodged memories in limbic sys & brain stem. Dreams start random then develop meaning. Its Neural theory.
  • Consolidation dream theory: brain is combining and processing memories for storage

Why is Sleep Necessary

  • Consolidation: storage of memories
  • Restoration: helps regenerate the immune system and restore energy

Sleep Disorders

  • Insomnia: Inability to fall / stay asleep (due to stress/anxiety)
  • Somnambulism (sleep walking) – happens during stage 3 - NOT during REM
  • Narcolepsy: fall into REM out of nowhere – treated w/ stimulants
  • Sleep Apnea: stop breathing while asleep (due to obesity usually)
  • REM behavior disorder: malfunction of mechanism that paralyze you during REM

Sensation Intro Vocab

  • Sensation: receive stimulus energy from environment
  • Transduction: convert that info into APs
  • Perception: brain interprets the info
  • Absolute Threshold: detection of signal 50% of time (is it there)
  • Just noticeable dif erence: can tell the dif erence b/w a stronger and weaker stimulus or two similar things (coke vs pepsi, did it get stronger?)
  • WEBER’S LAW: two stimuli must differ by a constant minimum proportion.(the stronger thing, the more you have to add to tell the difference)
  • Synesthesia: “disorder” where your senses blend (see sounds, etc)
  • Sensory Adaptation: diminished sensitivity as a result of constant stimulation (ex. nose blindness)– sensory receptors respond less (get tired)

Visual System

  • Lens: focuses light on retina
  • Retina: contains photoreceptors (rods/cones/ ganglion cells)
  • Fovea: area of best vision(cones here)
  • Rods: black/white, dark adaptation; way more rods than cones; located along sides of retina
  • Cones: color, bright light (red, green, blue) (only in the fovea)
  • Ganglion cells: create optic nerve (opponent process theory happens here)
  • Blind spot: occurs where the optic nerve leaves the eye –

Visual System Vocab

  • Accommodation: lens changes curvature to focus images on retina
  • Nearsightedness: better vision near
  • Farsightedness: better vision far

Theories of Color Vision

  • Trichromatic: three cones for receiving color
    • Blue – short waves
    • Green – medium waves
    • Red – long waves
  • Opponent Process: complementary colors are processed in ganglion cells – explains why we see an after image
    • Red/green
    • Blue/yellow
    • Black/white
  • Color deficiency
    • Damage to, or missing - cones or ganglion cells
      • Red/green is most common
      • Dichromatism – missing 1 cone
      • Monochromatism – only have rods

Cognition Pillar

  • Auditory System

Properties of Sound

  • Wavelength: distance bw peaks - pitch
    • Long waves = low pitch
    • Narrow waves = high pitch
  • Amplitude: height of wave – loudness
    • Short waves = soft
    • Tall waves = loud

Theories of Hearing

  • All occur in the cochlea
  • Place theory: location where hair cells bends determines sound (high pitches)
  • Frequency theory: rate at which action potentials are sent determines sound (low pitches)
  • Volley theory: groups of neurons fire APs out of sync

Other Hearing Stuff

  • Sound localization: which ear gets the waves first tells location of sound
  • Conduction deafness: damage to bones of ear and ear drum cause hearing loss
  • Sensorineural: damge to cochlea, hairs in cochlea, or nerve – usually due to old age and loud noise

Other Senses

  • Vestibular: Sense of balance (semicircular canals in the inner ear)
  • Kinesthetic: Sense of body position & movement wo looking
  • Pain: Gate-control theory: we have a “gate” to control how much pain is experience. Pain is both mental and physical
  • “Hot”: activation of warm and cold receptors

Taste (Gustation)

  • 6 taste receptors: bitter, salty, sweet, sour, umami (savory), oleogustus (fatty/oily)
  • Tongue, mouth, and brain process taste
  • Density of taste receptors makes ppl super tasters, medium tasters, or nontasters
  • Sensory interaction creates taste – wo smell taste isn’t as strong or is absent

Smell (Olfaction)

  • Only sense that does NOT route through the thalamus
  • Pheromones produce chemical signals w/in a species for attraction

Perception

  • Top-Down Processing: Whole idea (prior expectations) smaller parts (painting w/ faces)
  • Bottom-Up Processing: Smaller Parts (sensory info) Whole idea (dog of bunch of dots)
  • Schemas: preexisting mental concept of how something should look (like a restaurant)
  • Perceptual Set: tendency to see something as part of a group – speeds up signal processing

Gestalt Psychology

  • Whole is greater than the sum of its parts

Gestalt Principles

  • Figure/ground: organize information into figures objects (figures) that stand apart from surrounds (back ground)
  • Closure: mentally fill in gaps
  • Proximity: group things together that appear near each other
  • Similarity: group things together based off of looks
  • Constancies: recognize that objects do not physically change despite changes in sensory input (size, shape, brightness)
  • Apparent Movement: objects can appear moving when they aren’t (flip books, blinking lights)
  • Selective attention: focus on one thing and block out other things – can result in:
    • Inattentional Blindness: failure to notice something added b/c you’re so focused on another task (gorilla video)
    • Change Blindness: fail to notice a change in the scene (curtain changes color)
    • Cocktail party ef ect: notice your name across the room when its spoken, when you weren’t previously paying attention

Binocular Depth Cues

  • (how both eyes make up a 3D image)
  • Retinal Disparity: Image is cast slightly different on each retina, location of image helps us determine depth
  • Convergence: Eyes strain more (looking inward) as objects draw nearer

Monocular Depth Cues

  • (how we form a 3D image from a 2D image)
  • Interposition: overlapping images appear closer
  • Relative Size: 2 objects that are usually similar in size, the smaller one is further away
  • Linear Perspective: parallel lines converge with distance (think railroad tracks)
  • Relative Clarity: hazy objects appear further away
  • Texture Gradient: coarser objects=closer

Thinking & Problem Solving

  • Concepts: mental categories used to group objects, events, characteristics
  • Prototypes: all instances of a concept are compared to an ideal example
  • Algorithms: step by step strategies that guarantee a solution (formula)
  • Heuristics: short cut strategy
    • Representative Heuristic: make judgment based on your experience (like a stereotype) – assume someone must be a librarian b/c they’re quiet
    • Availability heuristic: make a judgement based on the first thing that pops in your head (assume planes are dangerous b/c crash in the news)
  • Metacognition: thinking about (reflecting upon) the way you think
  • Mental Set: keep using one strategy to solve a problem – cannot think outside the box
  • Functional Fixedness: can only see one (common) use for an item– cannot think outside of the box
  • Sunk Cost fallacy: continue something bc you’re already invested (might as well finish it now…) – when stopping would be more beneficial
  • Gambler’s Fallacy: believe something is more likely to happen bc its “due” – the dice have no memory
  • Divergent thinking: ability to think about many different things at once (Creative) – hindered by func. fixedness
  • Convergent thinking: limits creativity – one answer
  • Executive functioning: generating, organizing, planning, carrying out goal directed behvs

Memory

  • Encoding: Getting info into memory
    • Automatic encoding: requires no effort (what did you have for breakfast?)
    • Effortful encoding: requires work (school)
    • Levels (depth) of Processing: the more emphasis on MEANING the deeper the processing, and the better remembered
      • Structural encoding (shallow) – emphasis on physical structural
      • Phonemic encoding (intermediate)– emphasis on what words sound like
      • Semantic encoding (deep) = emphasis on meaning of the words
    • Elaborative Rehearsal – strategies to enhance encoding like below:
      • Imagery – attaching images to information makes it easier to remember
      • Dual encoding – using multiple methods of processing to remember (photo + words)
      • Chunking – break info into smaller units to aid in memory (like a phone #)
      • Mnemonics – shortcuts to help us remember info easier
        • Acronyms – using letter to remember something (PEMDAS)
        • Method of loci – using locations to remember a list of items in order
  • Context dependent memory: where you learn the info you best remember the info (scuba divers testing)
  • State dependent memory: the physical state you were in when learning is the way you should be when testing (study high, test high)
  • Mood congruent memory: remember happy events when happy, sad when sad
  • Forgetting curve: recall decreases rapidly at first, then reaches a plateau after which little more is forgotten
  • Distributed practice (spacing effect) – review a little every night (resets forgetting curve )
  • Massed practice – cramming
  • Testing effect – quizzing over material periodically

Storage

  • Retaining info over time
    • Multi-Store Model: Sensory memory, short term memory, long term memory model
    • Sensory Memory: stores all incoming stimuli that you receive (first you have to a pay attention)
      • Iconic Memory: visual memory, lasts 0.3 seconds
      • Echoic Memory: auditory memory, lasts 2-3 seconds
    • Short Term Memory: info passes from sensory memory to STM – lasts 30 secs, and can remember 7 ± 2 items
      • Maintenance Rehearsal (repeating the info) resets the clock
    • Long term memory: lasts a life time
      • Explicit – require conscious effort:
        • Episodic: events
        • Semantic: facts
      • Implicit- automatic, no effort needed:
        • Classical conditioning
        • Priming: info that is seen earlier “primes” you to remember something later on
        • Procedural: skills (muscle memory)
  • Working Memory Model: splits STM into 2 – visual spatial memory (from iconic mem) and phonological loop (from echoic mem). A “central executive” puts it together before passing it to LTM

Other Odd Types of Memory

  • Prospective memory: remembering you need to do something (pick up milk)
  • Autobiographical memory: memory for your personal history – combo of episodic and semantic
    • Superior autobiographical: rare condition – ppl have extra detailed memories
  • Memory organization
    • Hierarchies: memory is stored according to a clusters of related info
    • Categorically: stored in categories
    • Semantic networks: webs of semi-related info
      • Tip of the tongue phenomenon: can’t remember the name of something bs you’re stuck elsewhere in your semantic network
    • Schemas: frameworks that organize info
  • Assimilation: incorporate new info into existing schema Cat is a dog b/c 4 legs.
  • Accommodation: adjust existing schemas to incorporate new information Cat and dogs = different.

Memory Storage

  • Acetylcholine neurons in the hippocampus for episodic and semantic
  • Memories before age 3 are unreliable (infantile amnesia) – hippocampus still forming
  • Cerebellum for implicit / procedural memories
  • Amygdala for emotional memories
  • Frontal lobe for encoding and retrieval
  • Long-term potentiation: neural basis of memory – connections are strengthened over time with repeated stimulation (more firing of neurons)
    • Memory consolidation: memories are strengthened and made more stable with time

Retrieval

  • Taking info out of storage

Serial Position Effect

  • Tendency to remember the beginning (primacy effect) and the end (recency effect) of the list best
    • Primacy happens bc the info got moved to long term memory
    • Recency bc its still in your short term
  • Recall: remember what you’ve been told w/o cues (essays)
  • Recognition: remember what you’ve been told w/ cues (MCQ) (this one is better)
  • Repressed memories: unconsciously buried memories to defend the ego (psychodynamic approach)
  • Encoding failure: forget info b/c you never encoded it (paid attention to it) in the first place (which is the real penny)
  • Proactive interference: OLD info blocks new info
  • Retroactive interference: NEW info blocks old info

Development and Learning Pillar

  • Constructive memory: the way we update memories w/ new memories, associations, feelings – memory is unreliable
  • Source Amnesia: forget who told you, where you heard it
  • Misinformation effect: distortion of memory by suggestion or misinformation (lost in the mall, Disney land)
  • Framing: the way a question is framed impacts how info is recalled / perceived (how fast were the cars going when they smashed)
  • Imagination Inflation: ppl are more confident an event happened after imagining it (even though it didn’t happen)
  • Anterograde amnesia: amnesia moves forward (forget new info – 50 first dates)
  • Retrograde amnesia: amnesia moves backwards (forget old info)

Intelligence & Achievement

  • Intelligence theories are split:
    • Single form of intelligence (g factor) - general intelligence (g) underlies all mental abilities (typical IQ tests of today). If you’re smart in one area you’re smart in other areas too
    • Multiple intelligences: intelligence has lots of types, not just math/language. Can be high/low in areas

First IQ Test

  • Used a formula and is where the traditional value of “IQ” comes from
    • Chronological age = actual age
    • Mental age = tested age compared to other of that age
  • 100 is average, SD = 15
  • Use for IQ scores /tests today: educational services, diagnostic testing for learning disabilities, GT identification
  • Psychometrics: field of psych & education for creating tests
  • Standardization: test is given using consistent procedures and environments, and graded the same (SAT, AP exams)

Tests Should be Reliable

  • Same results over time (consistent)
    • Split-half reliability: compare two halves of the test
    • Test-retest reliability: use the same test on 2 different occasions

Tests Should be Valid

  • Test is accurate – measures what it is intended to
    • Construct validity: test measures what you want it to (an IQ test actually measures IQ)
    • Predictive validity: test is able to accurately predict a trait (high math scores predicts good engineer)
  • Standardized tests establish a normal distribution
  • Standard dev are used to compare scores. Standard deviation measures how much the scores vary from the mean. Percentages below NEVER change.

Types of Tests

  • Aptitude: predicts your abilities to learn a new skill (ASVAB)
  • Achievement: tests what you know(AP)

Historical Issues with Intelligence Testing

  • Nature vs Nurture Influence on IQ:
    • Genetics: MZ twins have similar IQ, adopted kids more similar to biological parents
    • Environment: early neglect leads to lower IQ, good schooling to higher IQ
  • Personal and sociocultural biases impact interpretation of results
  • Poverty and education inequalities neg. impact scores
  • Eugenics: study of how to “improve” the gene pool by discouraging (sterilizing or otherwise) individuals from reproducing
  • Culture fair tests – IQ tests have been used to refuse / limit access to jobs, military, education, and immigration
  • Need to focus on non-language skills & minimize cultural specific questions
  • Stereotype threat: feel at risk of conforming to the neg. stereotype about your group - influences your behaviors, cognitions
  • Stereotype lift: do better on a test when comparing self to other groups w/ neg stereotypes
  • FLYNN effect: IQ has steadily risen over the past 80 years – probably due to education standards, healthcare
  • Fixed Mindset: belief intelligence is fixed from birth – leads to less effort
  • Growth mindset: belief you can develop abilities through work and determination – leads to more effort

Development

  • “3 thematic issues” in Dev. Psych:
    1. Nature / Nurture (genes or environment)
    2. Continuous / Discontinuous (gradual dev over time or dev. In stage)
    3. Stability / Change (traits persist, unchanging or traits change as we age)
    • CROSS-SECTIONAL STUDY: ppl of different ages at the same point in time
      • Adv: inexpensive & quick
      • Disadv: can be differences due to generational gap
    • LONGITUDINAL STUDY: studies same ppl over time
      • Adv: eliminates