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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