Performance of domestic hens under progressive-ratio schedules of food delivery

Domestic hens were exposed to progressive-ratio 2 and progressive-ratio 10 schedules of food delivery with different initial ratios (2, 10, 20, 30, and 40). Breaking points, defined as the largest ratios completed before responding ceased for 600 consecutive seconds, were recorded under all conditio...

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Veröffentlicht in:Behavioural processes 1995-09, Vol.34 (3), p.233-239
Hauptverfasser: Robinson, T.A., Foster, T.M., Temple, W., Poling, A.
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Sprache:eng
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