Zentall, T. R., & Hogan, D. E. (1978). Same/different concept learning in the pigeon: the effect of negative instances and prior adaptation to transfer stimuli. J Exp Anal Behav, 30(2), 177–186.
Abstract: Pigeons were trained on a matching-to-sample or oddity-from-sample task with shapes (circle and plus). Half of each group was exposed to “negative instance” trials i.e., for matching birds, neither comparison key matched the sample, and for oddity birds both comparison keys matched the sample. When all birds were transferred to a new task involving colors (red and green), nonshifted birds (transferred from matching to matching, or oddity to oddity) performed significantly better than shifted birds (transferred from matching to oddity, or oddity to matching), but only if they had experienced negative instances of the training concept. When all birds were exposed to negative instances of the transfer task and then transferred to a new color task (yellow and blue), dramatic transfer effects were observed. The effect of pre-exposure to the yellow and blue colors, in order to reduce transfer-stimulus novelty, had a minor effect on transfer.
|
Schusdziarra, H., Schusdziarra, V. (1978). Gymnasium des Reiters.
|
Curcher Cs, R. M. (1978). Equidae. In: Maglio V H4.J & Cooke H B S (eds). Evolution of African Mammals 379-422, .
|
DIRSCHL HJ et al,. (1978). Preliminary results from an aereal census of livestock and wildlife of Kenya s rangelands.
|
Dirschl Hj, W. S. (1978). Grevy's Zebra abundance and distribution in Kenya, 1977. Ministry Tourism and Wildl; Areal survey rep ser, 4.
|
Dirschl Hj, W. S. (1978). Population indices and distribution of the Grevy's Zebra in Kenya, 1977. Aerial Survey Rep, 4.
|
Doreau M,. (1978). Comportement alimentaire du cheval à l`écurie. Ann Zootech, 27, 291–302.
|
Eisenmann V, T. J. - C. (1978). Sur la taxinomie du genre Equus. Cahiers Analyse Données, 3, 179–201.
|
Klingel H,. (1978). Den Wildeseln wird die Wüste zu eng. Sielmanns Tierwelt, 11, 46–51.
|
Klingel H,. (1978). La Vie Sociale des Zebres et des Antilopes. La Recherche, 86, 112–120.
|