ISSN:
1476-4687
Quelle:
Nature Archives 1869 - 2009
Thema:
Biologie
,
Chemie und Pharmazie
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
Notizen:
[Auszug] Five hungry male rats, maintained at 80 per cent of their weight when feeding ad libitum, were trained to obtain a drop of sweetened condensed milk by pressing a lever in the wall of a small chamber. Not every press was rewarded ; eligibility for reinforcement was programmed randomly and occurred, ...
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1038/1881199a0
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