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We analysed precisely, with video tapes, the behaviour of 38 Wistar rats submitted to a continuous reinforcement in a Skinner box. Animals displayed 14 different behavioural patterns close to the bar. We found that the increasing frequency of the bar press, generally considered as a unitary response was, in fact, due to summation of the development of several different behaviour frequencies. A...
In the natural setting, cognitive processes direct behavioural adjustments and sometimes result in behavioural novelties which allow the organism to cope with environmental pressures. The resulting behavioural changes exhibit various forms which are dependent upon different causal factors and cognitive processes. Under long-lasting environmental changes, these behavioural adaptations can become...
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