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Humans tend to value rewards more if they have had to work hard to obtain them (justification of effort). Similarly they tend to persist in a task even when they would be better off beginning a new one (sunk cost). Humans also often give greater value to objects of good quality than the same objects together with objects of lesser quality (the less is more effect). Commercial gambling (lotteries and...
In an extensive list of studies, it has been found that pigeons prefer an alternative associated with discriminative stimuli over another associated with non-discriminative stimuli, even when the probability of reinforcement is higher in the latter. This behavior has been named “suboptimal choice”. In the present experiment, we evaluated whether rats, another widely studied species within the Experimental...
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