PSYC 4750 Lecture 12: lecture 12
20 Mar 2018
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In this case we should use a biased design. Locomotor sensitization: sensitization enhanced motor response to a stimulus after repeated exposure to the stimulus. Impulsivity results in vulnerability to self-administration and drug abuse. Long-access group consumed the same amount of cocaine in the short-access group, but by day 6 it is back to pre-abstinence levels, and eventually escalates past these levels: shows that prior drug history can effect relapse behaviour. Extinction: extinction reduction in the strength or probability of a learned behaviour that occurs when the. Cs is presented without the us (in classical conditioning) or when the behaviour is no longer reinforced (in operant conditioning: does extinction destroy original learning, study that allowed animals to self-administer either sucrose or cocaine. Increase in responding in the beginning, which eventually extinguishes: the behaviour is just inhibited, it is not destroyed. Spontaneous recovery the reappearance of a cr to a cs after time has passed following the last extinction trial.
