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habituation training session was not a reliable index of subsequent startle tendency. This is important, because it could be argued that the lower startle level of Group 16-1000 in comparison to Group 2-1000 could have been due to some fatigue-like effect, since Group 16-1000 gave so many more re s p 0 n ses than Group 2-1000 during training (X = 451 vs 184). Comparison of Groups 16-1000 and 2-8000 revealed, however, that Group 2-8000 gave many more responses over its enti,!! training

The brain extracts from donor animals, trained on intermittent punishment avoidance tasks, were transferred by intraperitoneal injections to naive recipients. Two types of control conditions were used, (1) the brain extracts from untrained donors were injected into naive recipients and (2) water injections were given to naive Ss. The recipient animals also received intermittent punishment-avoidance (running) training. Measurements were made of exploratory, first-trial avoidance, and extinction behaviors. Evidence suggested transfer of avoidance tendencies from donor to recipient Ss.

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