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排序方式: 共有321条查询结果,搜索用时 15 毫秒
301.
Attentional control in the aging brain: insights from an fMRI study of the stroop task 总被引:18,自引:0,他引:18
Milham MP Erickson KI Banich MT Kramer AF Webb A Wszalek T Cohen NJ 《Brain and cognition》2002,49(3):277-296
Several recent studies of aging and cognition have attributed decreases in the efficiency of working memory processes to possible declines in attentional control, the mechanism(s) by which the brain attempts to limit its processing to that of task-relevant information. Here we used fMRI measures of neural activity during performance of the color-word Stroop task to compare the neural substrates of attentional control in younger (ages: 21-27 years old) and older participants (ages: 60-75 years old) during conditions of both increased competition (incongruent and congruent neutral) and increased conflict (incongruent and congruent neutral). We found evidence of age-related decreases in the responsiveness of structures thought to support attentional control (e.g., dorsolateral prefrontal and parietal cortices), suggesting possible impairments in the implementation of attentional control in older participants. Consistent with this notion, older participants exhibited more extensive activation of ventral visual processing regions (i.e., temporal cortex) and anterior inferior prefrontal cortices, reflecting a decreased ability to inhibit the processing of task-irrelevant information. Also, the anterior cingulate cortex, a region involved in evaluatory processes at the level of response (e.g., detecting potential for error), showed age-related increases in its sensitivity to the presence of competing color information. These findings are discussed in terms of newly emerging models of attentional control in the human brain. 相似文献
302.
Kirk EP Ashcraft MH 《Journal of experimental psychology. Learning, memory, and cognition》2001,27(1):157-175
The problem size effect in adult arithmetic performance is generally attributed to direct retrieval processes operating on a network representation in long-term memory. J. LeFevre and her colleagues (J. LeFevre, J. Bisanz, et al., 1996; J. LeFevre, G. S. Sadesky, & J. Bisanz, 1996) challenged this explanation using verbal report evidence that adults also use time consuming nonretrieval strategies to solve simple addition and multiplication. The authors replicated J. LeFevre and colleagues' methods, but added instructional biasing and silent control conditions to test these methods. Both reaction time and report results suggest that LeFevre and colleagues' conclusions about nonretrieval frequency may have been influenced by instructions that revealed the experimental hypothesis and affected participants' strategy reports. Obtaining evidence about adult strategy use in simple arithmetic will require understanding instructional demand and appropriate report methodology. 相似文献
303.
Kirk R. Blankstein Gary R. Winkworth 《Journal of Rational-Emotive & Cognitive-Behavior Therapy》2004,22(4):267-295
The current study examined associations between dimensions of perfectionism, levels of attributions for a self-identified problem with marks, and dysphoria and course final grade in university students (253 women; 125 men). Our study revealed several significant findings: (1) perfectionism and levels of attribution are distinct yet related constructs; (2) socially prescribed perfectionism and specific levels of attribution both accounted for unique variance in dysphoria; (3) there were significant gender differences with respect to the relations among perfectionism dimensions, levels of attribution, and dysphoria; (4) self-oriented perfectionism and specific levels of attribution both accounted for unique variance in final grade, but in men only; (5) interactions between perfectionism dimensions and levels of attribution did not augment the prediction of dysphoria or academic performance; (6) self-oriented perfectionism is possibly adaptive under some circumstances. Implications for treating perfectionists and for further research are discussed. 相似文献
304.
Reid-Arndt SA Stucky K Cheak-Zamora N DeLeon PH Frank RG 《Rehabilitation psychology》2010,55(4):321-330
PURPOSE: Changes in the health care environment have brought challenges and opportunities to the field of psychology. Practitioners have been successful in modifying service models to absorb losses of financial support for behavioral health care, due to managed care and public policy changes, while simultaneously managing the growing need for these services. However, in this reactive mode of responding to evolutions in the health care system, the field of psychology has at times lost sight of the long-term vision required to promote psychology's inclusion in the health care system of the future. In particular, a focus on training psychologists and ensuring the availability of funding to support these activities must be a priority in planning for the future. This article provides an overview of federal programs that currently offer funding for psychology training, as well as other opportunities for federal funding that have been unrealized. Details regarding advocacy efforts that were required to secure available sources of funding are given, followed by consideration of strategies for taking advantage of existing resources and prioritizing advocacy for additional funding. CONCLUSION: Funding for psychology training provides an avenue for increasing the number of well-trained psychologists who can serve patients' mental and behavioral health needs and thereby improve health outcomes. Moreover, capitalizing on available funding opportunities for psychology training and promoting efforts to expand these opportunities will help ensure that the field of psychology is positioned to remain an important contributor to the health care system of the future. 相似文献
305.
Three experiments investigated children's understanding of inference as a source of knowledge. Children observed a puppet make a statement about the color of one of two hidden toys after the puppet (a) looked directly at the toy (looking), (b) looked at the other toy (inference), or (c) looked at neither toy (guessing). Most 4-, 5-, and 6-year-olds did not rate the puppet as being more certain of the toy's color after the puppet looked directly at it or inferred its color than they did after the puppet guessed its color. Most 8 and 9-year-olds distinguished inference and looking from guessing. The tendency to explain the puppet's knowledge by referring to inference increased with age. Children who referred to inference in their explanations were more likely to judge deductive inference as more certain than guessing. 相似文献
306.
Bailey JM Kirk KM Zhu G Dunne MP Martin NG 《Journal of personality and social psychology》2000,78(3):537-545
Although men are substantially more interested than women in casual sex, there is ample variation in this trait (sociosexuality) within both sexes. One theory hypothesizes that within-sex sociosexual variation results from genetic variation maintained by frequency-dependent selection. If so, sociosexuality should be substantially heritable. A competing theory is that children acquire their mating strategy after observing their parents' relationship. By this theory, sociosexuality should reveal a strong shared environmental component. The authors studied genetic and environmental influences on sociosexuality using a large, representative volunteer twin sample. Parental marital instability was modestly associated with sociosexuality, but this could have been due to either genetic or environmental factors. Consistent with genetic theory, familial resemblance appeared primarily due to additive genetic rather than shared environmental factors. 相似文献
307.
308.
Kirk Ludwig 《No?s (Detroit, Mich.)》2014,48(1):75-105
This paper gives an account of proxy agency in the context of collective action. It takes the case of a group announcing something by way of a spokesperson as an illustration. In proxy agency, it seems that one person or subgroup's doing something counts as orconstitutes or is recognized as (tantamount to) another person or group's doing something. Proxy agency is pervasive in institutional action. It has been taken to be a straightforward counterexample to an appealing deflationary view of collective action as a matter of all members of a group making a contribution to bringing about some event. I show that this is a mistake. I give a deflationary account of constitutive rules in terms of essentially collective action types. I then give an account of one form of constitutive agency in terms of constitutive rules. I next give an account of status functions—of which being a spokesperson is one—that also draws on the concept of a constitutive rule. I then show how these materials help us to see how proxy agency is an expression of the agency of all members of the group credited with doing something when the proxy acts. 相似文献
309.
The aim of this work was to investigate perceived loudness change in response to melodies that increase (up-ramp) or decrease (down-ramp) in acoustic intensity, and the interaction with other musical factors such as melodic contour, tempo, and tonality (tonal/atonal). A within-subjects design manipulated direction of linear intensity change (up-ramp, down-ramp), melodic contour (ascending, descending), tempo, and tonality, using single ramp trials and paired ramp trials, where single up-ramps and down-ramps were assembled to create continuous up-ramp/down-ramp or down-ramp/up-ramp pairs. Twenty-nine (Exp 1) and thirty-six (Exp 2) participants rated loudness continuously in response to trials with monophonic 13-note piano melodies lasting either 6.4 s or 12 s. Linear correlation coefficients > .89 between loudness and time show that time-series loudness responses to dynamic up-ramp and down-ramp melodies are essentially linear across all melodies. Therefore, ‘indirect’ loudness change derived from the difference in loudness at the beginning and end points of the continuous response was calculated. Down-ramps were perceived to change significantly more in loudness than up-ramps in both tonalities and at a relatively slow tempo. Loudness change was also greater for down-ramps presented with a congruent descending melodic contour, relative to an incongruent pairing (down-ramp and ascending melodic contour). No differential effect of intensity ramp/melodic contour congruency was observed for up-ramps. In paired ramp trials assessing the possible impact of ramp context, loudness change in response to up-ramps was significantly greater when preceded by down-ramps, than when not preceded by another ramp. Ramp context did not affect down-ramp perception. The contribution to the fields of music perception and psychoacoustics are discussed in the context of real-time perception of music, principles of music composition, and performance of musical dynamics. 相似文献
310.
Kirk Summers 《Reformation & Renaissance Review》2018,20(2):134-154
Scholarly discussions on what constitutes Christian humanism in the Renaissance and Reformation periods have typically concentrated on its manifestations before 1536, when Erasmus died. In this period, the old arguments for the reading of the Classics once set out by Basil and Augustine still predominated. Calvin’s teaching on the Fall and the noetic effects of sin, however, provided another basis for the incorporation of pagan thought into Christian learning. Christians who followed Calvin benefited from his precise and comprehensive theological position on the place of worldly knowledge in God’s original creation as a means for justifying their study of the Classics. 相似文献