Retardation of fear acquisition by a previously inhibitory CS.
D000704:Analysis of Variance; D000818:Animals; D003214:Conditioning, Classical; D003213:Conditioning, Psychological; D004597:Electroshock; D005239:Fear; D008027:Light; D008297:Male; D008722:Methods; D010056:Overlearning; D051381:Rats; D013016:Sound