Chapter 5.1 and 5.4: Learning and Memory Flashcards
Nonassociative learning
when an organism is repeatedly exposed to one type of stimulus
ex. habituation and sensitization
Habituation
habit is an action that is performed repeatedly until it becomes automatic; a person learns to automatically “tune out” a stimulus
Dishabituation
when the previously habituated stimulus is removed; the person is no longer accustomed to the stimulus
Sensitization
the opposite of habituation; instead of being able to “tune out” or ignore the stimulus, the stimulus produces a more exaggerated response
Associative learning
one event, object, or action is directly connected with another
ex. classical conditioning and operant conditioning
Classical conditioning
two stimuli paired in such a way that the response to one of the stimuli changes
ex. Ivan Pavlov and his dogs; paired a bell with food, eventually dogs salivate at the sound of a bell
Neutral stimulus
initially does not elicit any intrinsic response - sound of bell for Pavlov’s dogs
unconditioned stimulus (US)
elicits an unconditioned response (UR), like a reflex; not a learned reaction, but a biological one - food is US and salivation is UR
conditioned stimulus
originally a neutral stimulus (bell) that is paired with an unconditioned stimulus until it can produce the conditioned response (salivating) without the unconditioned stimulus (food)
Conditioned response
the learned response to the conditioned stimulus (bell); it is the same as the unconditioned response (salivating), but now it occurs without the unconditioned stimulus (food)
Acquisition
the process of learning the conditioned response; when the bell and food are always paired
Extinction
the conditioned and unconditioned stimuli are no longer paired, so the conditioned response eventually stops occurring; if the bell is presented without food multiple times, the dog will stop salivating
Spontaneous recovery
extinct conditioned response occurs again when the conditioned stimulus is presented after some period of time
Generalization
stimuli other than the original conditioned stimulus elicit the conditioned response; if the dogs salivate to the sound of a chime or doorbell
Discrimination
opposite of generalization, when the conditioned stimulus is differentiated from other stimuli, thus the conditioned response only occurs for conditioned stimuli; the dogs don’t salivate at the sound of chime or horn
Operant conditioning
uses reinforcement (pleasurable consequences) and punishment (unpleasant consequences) to mold behavior and eventually causes associative learning; BF Skinner
Reinforcement
anything that will increase the likelihood that a preceding behavior will be repeated
positive - positive stimulus that occurs immediately following a behavior (food pellet for rats pushing lever)
negative - a negative stimulus that is removed immediately following a behavior (electric shock removed after rats push lever)
Primary (unconditional) reinforcers
innately satisfying or desirable; integral to our survival
secondary (conditional) reinforcers
learned to be reinforcers; neutral stimuli that are paired with primary reinforcers to make them conditioned
Reinforcement schedules
operant conditioning relies on this; can be continuous or intermittent - continuous reinforcement results in rapid behavior acquisition but also in rapid extinction, intermittent results in slower acquisition of behavior but greater persistence
Fixed-ratio schedule
reinforcement provided after a set number of instances of behavior
ex. every 10 times a wanted behavior is performed
Variable-ratio schedule
reinforcement provided after an unpredictable number of occurrences; this is the best
fixed-interval schedule
provides reinforcement after a set period of time that is constant, behavior will increase as the reinforcement interval comes to an end; this is the worst
variable-interval schedule
provides reinforcement after an inconsistent amount of time, produces a slow but steady behavior response rate