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82 Terms

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Sensation

The act of sensing the real world information.

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Perception

The process of becoming aware of something through the senses.

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Transduction

Conversion of an external stimulus into a neural signal.

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Psychophysics

The study of how our sensations correspond to physical events in the world.

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Absolute Threshold

The lowest level of stimulus needed for the nervous system to detect a change 50% of the time.

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Difference Threshold

The amount of stimulus energy required to produce a Just Noticeable Difference (JND).

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Weber’s Law

The principle that the amount of stimulus energy required to produce a JND is a constant fraction of stimulus intensity.

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Sensory Adaptation

The process in which sensory neurons adjust their sensitivity based on recent stimulus history.

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Motion After Effect

Opposing sensory or perceptual distortion that occurs after adaptation.

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Signal Detection Theory

The theory that describes how stimuli are detected under different conditions.

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Signal

What you are trying to detect.

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Noise

Similar stimuli that compete with the signal and interfere with your ability to detect the signal.

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Signal to Noise Ratio

The difficulty of detecting the signal depends on the strength of the signal in relation to the strength of the noise.

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Attention

The process of focusing on specific parts of overwhelming input in order to process them deeply.

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Cocktail Party Effect

The phenomenon where important information pops out in a conversation that you are not attending.

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Inattentional Blindness

The failure to notice unattended stimuli as if they weren't there.

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Change Blindness

A version of inattentional blindness that occurs when you fail to detect obvious changes in your environment.

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Bottom-Up Processing

Processing information that starts with sensory input. Specific and moves to the general.

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Top-Down Processing

Processing information that starts with the mind and expectations. general to specific

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Perceptual Sets

Sets formed when expectations influence perceptions.

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Illusion

When the way we perceive a stimulus does not match its physical reality.

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Color Perception

The way we perceive reflected light as color.

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Hue

The color of light which corresponds to wavelength.

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Trichromatic Theory

The theory that color vision is based on three primary colors: blue, green, and red.

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Opponent Process Theory

The theory that we perceive colors in terms of three pairs of opponent colors.

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Depth Perception

The ability to judge distance and spatial relationships.

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Binocular Depth Cues

Depth cues that involve both eyes, such as binocular disparity.

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Monocular Depth Cues

Depth cues that involve one eye, such as relative size and interposition.

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Figure-Ground Separation

The visual system's automatic attempt to distinguish figure from background.

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Common Fate

Objects moving in the same direction at the same speed are perceived as a group.

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Sound

Vibration or mechanical energy that travels through some medium.

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Pitch

The frequency of a sound wave, measured in Hz.

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Loudness

The amplitude or height of a sound wave, measured in dB.

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Timbre

The quality or complexity of a sound.

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Outer Ear

Part of the ear that funnels sound to the eardrum.

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Middle Ear

Transmits sounds from the eardrum to the inner ear.

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Inner Ear

Transduces sound; includes the cochlea.

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Cochlea

The structure in the inner ear where sound transduction occurs.

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Place Theory

Theory that specific locations on the basilar membrane match tones with specific pitches.

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Frequency Theory

Theory that the firing rate of neurons matches the pitch of a sound.

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Operant Conditioning

Learning that occurs based on the consequences of behavior.

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Classical Conditioning

Learning in which two stimuli are repeatedly paired.

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Reinforcement

An increased likelihood of a behavior being repeated.

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Punishment

A decreased likelihood of a behavior being repeated.

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Positive Reinforcement

Adding a pleasant stimulus to increase a behavior.

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Negative Reinforcement

Removing an unpleasant stimulus to increase a behavior.

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Positive Punishment

Adding an unpleasant stimulus to reduce a behavior.

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Negative Punishment

Removing a pleasant stimulus to reduce a behavior.

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Spontaneous Recovery

The reappearance of a previously extinguished conditioned response.

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Observational Learning

Learning by observing and imitating others.

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Insight Learning

Immediate understanding of a problem without trial and error.

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Memory

The capacity to store and retrieve information.

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Encoding

Getting information into memory.

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Storage

Keeping information in memory.

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Retrieval

Accessing information from memory.

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Sensory Memory

Holds sensory information for a very short duration.

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Short Term Memory

Retaining information for a brief period (15-30 seconds).

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Long Term Memory

Storage of information over extended periods.

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Explicit Memory

Memories we can recall intentionally.

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Implicit Memory

Memories that cannot be consciously recalled.

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Schema

An organized knowledge structure used for understanding and remembering information.

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Misinformation Effect

Creation of false memories due to misleading information after an event.

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Flashbulb Memories

Vivid memories for important events.

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Chunking

Organizing information into manageable units to enhance memory.

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Rehearsal

The mental repetition of information to maintain it in short-term memory.

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Retroactive Interference

The process where new information disrupts the retrieval of old information.

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Amnesia

Loss of memory due to brain damage or trauma.

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Retrograde Amnesia

Inability to recall past memories but can form new memories.

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Anterograde Amnesia

Inability to form new memories after a trauma.

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Cognitive Biases

Systematic patterns of deviation from norm or rationality in judgment.

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Heuristic

Mental shortcuts that simplify decision making.

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System 1 Thinking

Fast, intuitive, and emotional thinking.

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System 2 Thinking

Slow, deliberate, and logical thinking.

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Confirmation Bias

The tendency to seek evidence that supports our beliefs.

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Framing Effect

Being influenced by how information is presented.

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Intelligence

The capacity for abstract reasoning, learning, and adapting.

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Fluid Intelligence

The ability to solve new problems quickly.

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Crystallized Intelligence

Accumulated knowledge and skills over time.

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Growth Mindset

Belief that abilities can be developed through dedication and hard work.

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Fixed Mindset

Belief that abilities are static and cannot be changed.

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The Flynn Effect

The observed rise in IQ scores over time.

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Wechsler Adult Intelligence Scale

A widely used intelligence test that measures different aspects of intelligence.