Abstract

References
1.
Hirsch
J.
Lindley
R. H.
Tolman
E. C.
An experimental test of an alleged innate sign stimulus . J. comp. physiol. Psychol. , 1955 , 48 , 278 –280 .
2.
Tinbergen
N.
Social releasers and the experimental method required for their study . Wilson Bull. , 1948 , 60 , 6 –51 .
