Chapter 3c Flashcards
homeostasis
the tendency for a system to remain stable and resist change
the regulation of the system by negative feedback loops
conditioned withdrawal
can occur if the preparatory stimuli (CSs) elicited conditioned responses and the drug (US) is not delivered
placebo effects
when an inert substance has an effect on a person’s physiological wellbeing
compound stimuli
two conditioned stimuli are presented together before (delayed) or during (simultaneous) a US. These two stimuli presented together can elicit a single response
overshadowing
when one stimulus is more powerful than the other and becomes the CS when a compound stimulus is arranged consisting of two or more simple stimuli presented at the same time
blocking
when CS1 followed by the US blocks a subsequent CS2–US association
conditioned suppression
a CS is followed by an aversive US (such as an electric shock) and the CS becomes a conditioned aversive stimulus which can elicit a conditioned emotional response such as anxiety or fear
rescorla-wagner model
a conditioned stimulus acquires a limited amount of associative strength on any trial
associative strength
the relation between the CS and the magnitude of the CR
increases over conditioning trials and reaches some max
maximum associative strength
a given CS can only acquire a certain amount of control over a conditioned response
change in associative strength
difference between the present strength of the CS and its maximum possible value
salience
determines how quickly the associative strength of the CS rises to the maximum
value from 0-1 and is estimated after conditioning
