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81.
Emily B. Myers Sheila E. Blumstein Edward Walsh James Eliassen 《Psychological science》2009,20(7):895-903
ABSTRACT— The problem of mapping differing sensory stimuli onto a common category is fundamental to human cognition. Listeners perceive stable phonetic categories despite many sources of acoustic variability. What are the neural mechanisms that underlie this perceptual stability? In this functional magnetic resonance imaging study, a short-interval habituation paradigm was used to investigate neural sensitivity to acoustic changes within and between phonetic categories. A region in the left inferior frontal sulcus showed a pattern of activation consistent with phonetic invariance: insensitivity to acoustic changes within a phonetic category and sensitivity to changes between phonetic categories. Left superior temporal regions, in contrast, showed graded sensitivity to both within- and between-category changes. These results suggest that perceptual insensitivity to changes within a phonetic category may arise from decision-related mechanisms in the left prefrontal cortex and add to a growing body of literature suggesting that the inferior prefrontal cortex plays a domain-general role in computing category representations. 相似文献
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M. Todd Allen Catherine E. Myers Mark A. Gluck 《Integrative psychological & behavioral science》2001,36(1):36-61
Classical conditioning has been explained by two main types of theories that postulate different learning mechanisms. Rescorla
and Wagner (1972) put forth a theory in which conditioning is based on the ability of the US to drive learning through error
correction. Alternatively, Mackintosh (1973) put forth a theory in which the ability of the CS to be associated with the unconditioned
stimulus is modulated. We have proposed a reconciliation of these two mechanisms as working in parallel within different neural
systems: a cerebellar system for US modulation and a hippocampal system for CS modulation. We developed a computational model
of cerebellar function in eyeblink conditioning based on the error correction mechanism of the Rescorla-Wagner rule in which
learningrelated activity from the cerebellum inhibits the inferior olive, which is the US input pathway to the cerebellum
(Gluck et al., 1994). We developed a computational model of the hippocampal region that forms altered representations of conditioned
stimuli based on their behavioral outcomes (Gluck & Myers, 1993; Myers et al., 1995). Overall, computational modeling and
empirical findings support the idea that, at least in the case of eyeblink conditioning, there may be two different neural
systems: the cerebellum which mediates US-based error correction and hippocampus which alters representations of CSs. 相似文献
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Mark A. Gluck M. Todd Allen Catherine E. Myers Richard F. Thompson 《Neurobiology of learning and memory》2001,76(3):314-341
The authors evaluate a mapping of Rescorla and Wagner's (1972) behavioral model of classical conditioning onto the cerebellar substrates for motor reflex learning and illustrate how the limitations of the Rescorla-Wagner model are just as useful as its successes for guiding the development of new psychobiological theories of learning. They postulate that the inhibitory pathway that returns conditioned response information from the cerebellar interpositus nucleus back to the inferior olive is the neural basis for the error correction learning proposed by Rescorla and Wagner (Gluck, Myers, & Thompson, 1994; Thompson, 1986). The authors' cerebellar model expects that behavioral processes described by the Rescorla-Wagner model will be localized within the cerebellum and related brain stem structures, whereas behavioral processes beyond the scope of the Rescorla-Wagner model will depend on extracerebellar structures such as the hippocampus and related cortical regions. Simulations presented here support both implications. Several novel implications of the authors' cerebellar error-correcting model are described including a recent empirical study by Kim, Krupa, and Thompson (1998), who verified that suppressing the putative error correction pathway should interfere with the Kamin (1969) blocking effect, a behavioral manifestation of error correction learning. The authors also discuss the model's implications for understanding the limits of cerebellar contributions to associative learning and how this informs our understanding of hippocampal function in conditioning. This leads to a more integrative view of the neural substrates of conditioning in which the authors' real-time circuit-level model of the cerebellum can be viewed as a generalization of the long-term memory module of Gluck and Myers' (1993) trial-level theory of cerebellar-hippocampal interaction in motor conditioning. 相似文献
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Hector F. Myers Sylvie Taylor Kerby T. Alvy Angela Arrington Mark A. Richardson 《American journal of community psychology》1992,20(5):557-576
Studied contributions of maternal psychological distress, family stress load, maternal and family risk factors, and family coping strategies in predicting behavior problems in 441 inner-city black primary-grade children. Results indicated maternal psychological distress and high family stress load were associated with high child behavior problems. Family coping strategies offered no protection against risk, while coping with life difficulties by reframing them was detrimental to child behavioral adjustment. Active help-seeking strategies (i.e., family mobilization, acquiring social supports) served to moderate the effects of maternal psychological distress and family risk attributes for boys, but exacerbated the effects of dysfunctional maternal social and psychiatric histories for girls. Implications for understanding vulnerability and resilience in inner-city black children and recommendations for future research are discussed. 相似文献
90.
Jane E. Myers 《Journal of counseling and development : JCD》1992,71(2):136-139
The American Counseling Association's (ACA), formerly the American Association for Counseling and Development (AACD), unique contribution to a wellness philosophy lies in the profession's concern for development over the life span. In this article, ACA's commitment to and proactive stance toward wellness are described, the relationship between wellness, developmental approaches, and prevention is addressed, and the debate surrounding prevention as a non-third-party-reimbursable mental health service is discussed. 相似文献