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91.
ABSTRACT. Cybernetic theories of self-regulation contend that an individual's goal system may work best to the extent it is differentiated. The present investigation pioneered an assessment of goal differentiation in relation to an important feature of goals—intrinsic motivation—and quantified the extent to which intrinsic motivation systematically increased from low- to mid- to high-level goals, the resulting individual difference termed cybernetic self-determination. In Study 1 (n = 106), it was found that frustrating daily events precipitated motivations to quit at low, but not high, levels of cybernetic self-determination. In Study 2 (n = 111), it was found that negative feedback was associated with reduced goal persistence at low, but not high, levels of cybernetic self-determination. The findings therefore converge on the idea that individual differences in cybernetic self-determination are consequential in buffering reactions to obstacles in daily life. Implications for personality, motivation, and self-regulation literatures are discussed.  相似文献   
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The present study employed a behavioural detection approach to investigate the combined effects of sample duration and sample presentation frequency on delayed matching accuracy of pigeons. Experiment 1 showed that when both samples were exposed at each of the two possible durations within a two-alternative, delayed matching session, discriminability was higher to the longer duration sample than to the short-duration sample, as found when sample duration is varied between sessions. Experiment 2's asymmetrical procedure increased bias toward the more frequent of the two samples but had no influence on discriminability. Initial discriminability was higher to samples exposed for longer durations, irrespective of stimulus presentation frequency. The results suggest qualitatively different effects of the two sources of stimulus control under consideration: Sample duration (a local or within-trial manipulation) exerted its effect on discrimination of the stimuli, whereas sample presentation frequence (a global factor) exerted its major effect on response bias. An interpretation of the data in terms of Blough's (1996) analysis of errors in matching tasks suggests that the amount of behaviour under control of the sample stimulus markedly changed with different sample durations. The analysis also showed that the biasing manipulation exerted most of its effect on the portion of behaviour outside of control by the critical stimulus. We argue that theoretical accounts of delayed matching performance need to consider both local and global factors as determinants of matching accuracy.  相似文献   
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Three experiments used appetitive conditioning with rats to examine the involvement of elemental and configural processes in positive and negative patterning discriminations. The first experiment demonstrated that negative and, to some extent, positive patterning discriminations were learned more rapidly when these discriminations consisted of stimulus elements that had previously been the reinforced as opposed to the non-reinforced elements of a simple discrimination. Experiment 2 revealed an excitatory summation effect during the early phase of negative patterning learning that depended upon discrimination pretraining. The final experiment demonstrated faster discrimination learning between the compound and the less salient, rather than the more salient, element of an instrumental patterning task. The present set of results were interpreted as reflecting the possibility, consistent with connectionist theory, that internal representations of the conditioned stimuli change over the course of a patterning discrimination.  相似文献   
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