Chong RK  Do MC 《Perceptual and motor skills》2002,95(1):155-162

We investigated the interaction between transient change in the local structure of gastrocnemius muscle fibers and the segmented leg motor responses elicited by toes-up rotation of the support surface. The gastrocnemius muscle in healthy young subjects underwent a sustained 2-min, isometric stretch (Prestretch group), followed immediately by the rotations. Analysis showed that the prestretch affected the amplitude of the monosynaptic but not the automatic components of the medial gastrocnemius muscle responses (monosynaptic response: 93 +/- 20% of the mean of the last three rotations in the Prestretch group compared to 174 +/- 42% in the Control group; automatic response: 128 +/- 18% in the Prestretch group versus 123 +/- 31% in the Control group). The shortened tibialis anterior muscle response and the onset latencies of responses were not affected by prestretching the gastrocnemius muscle. The prestretch effect on the amplitude of the monosynaptic (mediated by group Ia afferents) but not the automatic gastrocnemius muscle response (mediated by group II afferents) suggests that the automatic component of the muscle response to platform rotations has a stronger supraspinal influence than the monosynaptic response and is thus less affected by local events such as prolonged stretching.  相似文献   

    

Y. van Beek  M.L. Genta  A. Costabile  A. Sansavini 《Infant and child development》2006,15(1):41-58

In three European regions (The Netherlands, Northern Italy and Southern Italy) we investigated whether mothers of healthy pre‐term infants (n=92) adjust their expectations for the timing of developmental milestones in the first years of life as compared to mothers of full‐term infants (n=140). We examined whether these adjustments could be seen as reflecting a pessimistic view, as would be predicted from the ‘prematurity stereotype’ perspective. Partial corrections for prematurity were regularly made, but no indications were found for an overly pessimistic view. Moreover, the differences between the regions in the anticipated timing of mastery of milestones were larger than the effects of prematurity. Copyright © 2006 John Wiley & Sons, Ltd.  相似文献   

    

Carrianne K.Y. Leung 《Studies in Ethnicity and Nationalism》2006,6(2):162-179

Notions of national heritage and identity are complicated in Canada, a settler nation with its central characteristic presented as institutionalised multiculturalism. Popular and official discourses of heritage and multiculturalism work together to produce ideas of Canadian‐ness. The twin objectives of this paper are to describe how representations of racial difference are used as a resource to produce notions of official multiculturalism and a ‘heritage of multiculturalism’ discourse — or how notions of multiculturalism emerge as an integral part of national culture/heritage/identity. I argue that the conceptualisation of ‘heritage’ and ‘multiculturalism’ are produced through the representation of racialised difference in national narratives and that taken together, the two discourses act as a highly flexible form of governmentality.  相似文献   

    

Bruce Y. Lee  Andrew B. Newberg 《Zygon》2005,40(2):443-468

Abstract. The study of the relationship between religion and health has grown substantially in the past decade. There is little doubt that religion plays an important role in many people's lives and that this has an impact on their health. The question is how researchers and clinicians can best evaluate the available information and how we can improve upon the current findings. In this essay we review the current knowledge regarding religion and health and also critically review issues pertaining to methodology, findings, and interpretation of these studies. It is important to maintain a rigorous perspective with regard to such studies and also to recognize inherent limitations and suggest constructive ways in which to advance this field of study. In the end, such an approach can provide new information that will improve our understanding of the overall relationship between religion and health.  相似文献   

    

Andrew B. Newberg  Bruce Y. Lee 《Zygon》2005,40(2):469-490

Abstract. With the rapidly expanding field of neuroscience research exploring religious and spiritual phenomena, there have been many perspectives as to the validity, importance, relevance, and need for such research. In this essay we review the studies that have contributed to our current understanding of the neuropsychology of religious phenomena. We focus on methodological issues to determine which areas have been weaknesses and strengths in the current studies. This area of research also poses important theological and epistemological questions that require careful consideration if both the religious and scientific elements are to be appropriately respected. The best way to evaluate this field is to determine the methodological issues that currently affect the field and explore how best to address such issues so that future investigations can be as robust as possible and can become more mainstream in both the religious and the scientific arenas.  相似文献   

    

Alloy LB  Abramson LY  Whitehouse WG  Hogan ME  Panzarella C  Rose DT 《Journal of abnormal psychology》2006,115(1):145-156

Do negative cognitive styles provide similar vulnerability to first onsets versus recurrences of depressive disorders, and are these associations specific to depression? The authors followed for 2.5 years prospectively college freshmen (N = 347) with no initial psychiatric disorders at high-risk (HR) versus low-risk (LR) for depression on the basis of their cognitive styles. HR participants had odds of major, minor, and hopelessness depression that were 3.5-6.8 times greater than the odds for LR individuals. Negative cognitive styles were similarly predictive of first onsets and recurrences of major depression and hopelessness depression but predicted first onsets of minor depression more strongly than recurrences. The risk groups did not differ in incidence of anxiety disorders not comorbid with depression or other disorders, but HR participants were more likely to have an onset of anxiety comorbid with depression.  相似文献   

  总被引：1，自引：0，他引：1  

Sarah DeArmond  Mary Tye  Peter Y. Chen  Autumn Krauss  D. Apryl Rogers  Emily Sintek 《Journal of applied social psychology》2006,36(9):2184-2214

The current research investigated age and gender stereotypes in relation to adaptive performance. Using methods similar to those used in Schein's studies (1973, 1975) , 496 undergraduate students rated 1 of 7 targets on 6 dimensions of adaptive performance. All of the targets varied in age (25, 40, or 55 years) and gender, except one that was age and gender neutral. The 7^th served as a reference group and was an age- and gender-neutral target. Results showed that older targets were perceived as less adaptable across most of the dimensions of adaptability. Further, men and women were perceived differently, but differences were consistent with many prevalent gender stereotypes. Finally, female participants tended to rate all targets more favorably than male participants. Implications for human resources management and future research on stereotypes at work are discussed.  相似文献   

    

Tomanari GY  Sidman M  Rubio AR  Dube WV 《Journal of the experimental analysis of behavior》2006,85(3):349-369

Five adult humans were tested for emergent conditional discriminations under rapid-responding contingencies. During four-comparison matching-to-sample baseline training (AB and AC), limited-hold contingencies for responding to samples and comparisons were gradually restricted to the shortest duration consistent with at least 95% accuracy and no more than 5% failures to respond. The final limited-hold values were 0.4-0.5 s for samples and 1.2-1.3 s for comparisons; mean response latencies were 0.15-0.28 s for samples and 0.59-0.73 s for comparisons; inter-trial intervals were 0.4 s. With these fast-responding requirements, test blocks presented 72 probe trials interspersed among 72 baseline trials, all without programmed differential consequences. Four equivalence test blocks (BC and CB probes, which tested simultaneously for both symmetry and transitivity) were followed by four symmetry (BA and CA probes) test blocks. Three subjects' results documented emergent performances indicative of equivalence classes despite fast-responding requirements that severely limited the time available for mediating vocal or subvocal responses. For these three subjects, mean latencies were slightly shorter in baseline trials than in probes, and shorter on symmetry than on equivalence probes. These differences, however, were usually less than the differences among mean latencies on the different types of trials within the baseline and probed performances.  相似文献   

    

Mary M. Herrald  Joe Tomaka  Amanda Y. Medina 《Journal of applied social psychology》2002,32(6):1107-1123

This experiment examined the effects of pet ownership and potential mediating (e.g., social support) and moderating variables (e.g., gender, personality, pet attachment) on completion of a 12‐week cardiac rehabilitation program. This experiment assessed pet ownership, personality, and psychosocial variables at the beginning of the program and followed participants through to completion. Results showed that pet owners (96.5%) were significantly more likely to complete cardiac rehabilitation compared with non‐owners (79.2%). Covariance analyses ruled out several alternative explanations for the results, including social support, personality variables, personal efficacy, and pet attachment. Results suggest that having a pet may facilitate rehabilitation and that further research is needed to understand how having a pet or being a pet owner improves health outcomes.  相似文献   

    

Y. M. Lisa Chuah  Murray T. Maybery 《International journal of psychology》1999,34(5-6):374-377

Developments in serial short-term memory (STM) typically have been assessed using verbal items, and mechanisms of development unique to the verbal system have been postulated. Here we review two studies of the development of spatial STM. The first (Chuah & Maybery, 1999) showed that variance in spatial span was partitioned among a set of predictor variables in a configuration very similar to that found for verbal span. The second (Maybery & Chuah, 1999) examined the timing of recall for spatial sequences. Intervals between touches as children recalled spatial sequences showed comparable effects to those reported for the oral recall of verbal sequences. Discussion focuses on processes that could serve both verbal and spatial memory and mediate span development.  相似文献