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41.
Participants often respond more quickly and more accurately to a repeated stimulus compared to a non-repeated one, a phenomenon known as repetition priming. In semantic classification tasks priming appears to be largely attributable to the learning of stimulus-decision and stimulus-response associations, which allow participants to bypass many of the processes engaged during initial stimulus analysis. The current study tested whether stimulus-response learning plays a similarly dominant role in priming that occurs in perceptual classification tasks. Unfamiliar objects were used as stimuli to reduce the influence of semantic processes on priming and the task switched for all test trials to eliminate stimulus-decision learning. The results showed across-task priming as measured by reaction time facilitation and improved accuracy when the response remained the same during the encoding and test phases. When the response switched, similar levels of reaction time facilitation were observed, but priming as measured by accuracy was significantly reduced and no longer significant. These findings indicate that stimulus-response learning contributes to priming in perceptual classification tasks, but does not play a dominant role. Significant stimulus-level learning that is independent of the task and response also occurs and likely indexes facilitated perceptual processing of the objects. 相似文献
42.
Julio-Pieper M O'Mahony CM Clarke G Bravo JA Dinan TG Cryan JF 《Stress (Amsterdam, Netherlands)》2012,15(2):218-226
Mood disorders and chronic stress are frequently associated with gastrointestinal (GI) symptoms including diarrhoea or constipation. Locally produced serotonin [5-hydroxytryptamine (5-HT)] regulates GI motility and is a key factor in the pathophysiology of stress-associated GI disorders. We aimed to establish whether chronic stress can differentially affect faecal output and colon 5-HT concentration in two inbred mouse strains: BALB/c and C57BL/6 which differ in their ability to cope with stress. Adult male BALB/c and C57BL/6 mice were restrained for 2?h daily for 10 days. Defecation was monitored during each stress session. Twenty-four hours after the last session of stress, plasma corticosterone concentration was higher than control in both strains, indicative of a physiological effect of chronic stress; however, stress-induced diarrhoea was more persistent in C57BL/6 mice. Basal concentration of colon 5-HT was higher in C57BL/6 mice, and stress elicited an increase in colon 5-HT only in this strain. Finally, na?ve BALB/c mice had a higher sensitivity (incidence of diarrhoea) to 5-HT (0.33?mg/kg, i.p.) than C57BL/6 mice. Our results suggest that differential defecation responses to stress may be associated with colon 5-HT concentration, which may in turn reflect the individual sensitivity to 5-HT. In addition, C57BL/6 mice emerge as a relevant model for studying GI alterations induced by chronic stress. 相似文献
43.
Mathias CW Michael Furr R Sheftall AH Hill-Kapturczak N Crum P Dougherty DM 《Suicide & life-threatening behavior》2012,42(3):341-351
Both researchers and oversight committees share concerns about patient safety in the study-related assessment of suicidality. However, concern about assessing suicidal thoughts can be a barrier to the development of empirical evidence that informs research on how to safely conduct these assessments. A question has been raised if asking about suicidal thoughts can result in iatrogenic increases of such thoughts, especially among at-risk samples. The current study repeatedly tested suicidal ideation at 6-month intervals for up to 2-years. Suicidal ideation was measured with the Suicidal Ideation Questionnaire Junior, and administered to adolescents who had previously received inpatient psychiatric care. Change in suicidal ideation was tested using several analytic techniques, each of which pointed to a significant decline in suicidal ideation in the context of repeated assessment. This and previous study outcomes suggest that asking an at-risk population about suicidal ideation is not associated with subsequent increases in suicidal ideation. 相似文献
44.
Given the popular and ever-increasing use of path analytic research paradigms in the social sciences, it is desirable to conduct an investigation into the accuracy of the standardized path coefficients that are often the end-product of these paradigms. In pursuit of this goal, population parameters were preset concerning the correlations between all of the variables and their reliability coefficients. Based on these parameters, thousands of experiments were generated with varying numbers of cases (n). For each experiment, at each level of n, standard path analyses were conducted, and standardized path coefficients were obtained. These standardized path coefficients were then compared against the population path coefficients on which the simulations were based to determine their accuracy. The findings indicate mixed evidence for the accuracy of path analysis research paradigms. 相似文献
45.
Using a sample of 196 undergraduate students, the present study investigated the psychometric properties of the Spiritual
Fitness Assessment, a measure of spiritual fitness designed for use by health and fitness professionals. Examination of inter-item
consistency produced satisfactory alpha coefficients for the total test and its three subscales. Correlations of the SFA with
measures of spirituality and spiritual well-being provide support for convergent validity. Significant positive correlations
with a measure of self-esteem suggest that the test has satisfactory criterion validity. Correlations with age, sex, and a
measure of social desirability indicate that the SFA is significantly, though only moderately, affected by demographic variables
and motivated response tendencies. Factor analysis of the SFA items indicate that the test is factorially complex and subscales
may need to be refined to better measure their intended constructs. Overall, the results of the study suggest that the test
may be useful for evaluations of spiritual fitness. Further research with samples drawn from different populations is needed
on the test to better establish its reliability and validity. 相似文献
46.
47.
Resisting and Conforming to the ‘Lesbian Look’: The Importance of Appearance Norms for Lesbian and Bisexual Women 下载免费PDF全文
Caroline Huxley Victoria Clarke Emma Halliwell 《Journal of community & applied social psychology》2014,24(3):205-219
Appearance is one way in which lesbian and bisexual identities and affiliation to lesbian, gay, bisexual (LGB) subculture can be demonstrated. ‘Butch’ and ‘androgynous’ styles have been used by lesbian women to communicate a non‐heterosexual identity. However, some LGB appearance researchers have argued that there has been a mainstreaming and diversification of lesbian style in the last couple of decades, which has resulted in less distinction between lesbian and straight looks. This research draws on the Social Identity approach to explore contemporary style in lesbian and bisexual communities. Fifteen lesbian and bisexual women took part in semi‐structured interviews which were analysed using thematic analysis. Although some participants reported a diversification of lesbian style, most used the term ‘butch’ to describe lesbian style, and a ‘boyish’ look was viewed as the most common contemporary lesbian style. By contrast, most participants could not identify distinct bisexual appearance norms. The data provide evidence of conflicting desires (and expectations) to visibly project social identity by conforming to specific lesbian styles, and to be an authentic, unique individual by resisting these subcultural styles. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
48.
Lindsay Hinzman E. Paige Lloyd Keith B. Maddox 《Social and Personality Psychology Compass》2022,16(2):e12654
The human face is an important source of information, such as race or ethnicity, which can guide social interaction and outcomes. Research suggests that compared to majority and dominant group members, minority and subordinate group members tend to experience chronic stigma, resulting in more negative life outcomes (e.g., educational and occupational attainment). We argue that theory and research exploring face perception has not led to models that incorporate how the chronic experience of stigma may impact judgments, reflecting a gap with potential consequences for the validity and generalizability of the theories developed. We propose a framework for understanding how experiencing a socially stigmatized racial identity may lead perceivers to engage in face processing differently from their non-stigmatized counterparts. With a focus on the literature examining the cross-race effect, we explore the potential impact of chronic social stigma on three theorized moderators guiding processing and memory for same-versus cross-race faces. Our analysis suggests that future research focusing on stigmatized perceivers could help to explain some variation in findings, lead to novel theoretical development, and ultimately produce more generalizable research across several domains of inquiry. 相似文献
49.
David Clarke 《Philosophia》2014,42(3):571-591
Most works about the philosophy of Martin Heidegger either disregard Heidegger’s attachment to National Socialism or assume the ‘minimalist’ view that his attachment was a brief political aberration of no consequence for his philosophy. This paper contends that the minimalist view is not only factually wrong but also that its assumption promotes methodological errors and poor philosophy. To assess this contention we examine two important texts from one of the more fertile fields in current philosophy: Jeff Malpas’s Heidegger’s Topology: Being, Place, World (2006) and Heidegger and the Thinking of Place (2012). Malpas claims that Heidegger’s rejection of National Socialism spurred, or was concomitant with, new directions in his philosophy. These claims are wrong. The paper concludes that any work about Heidegger’s philosophy must first acknowledge and understand his enduring attachment to National Socialism. 相似文献
50.
Quantum indeterminism is frequently invoked as a solution to the problem of how a disembodied soul might interact with the brain (as Descartes proposed), and is sometimes invoked in theories of libertarian free will even when they do not involve dualistic assumptions. Taking as example the Eccles–Beck model of interaction between self (or soul) and brain at the level of synaptic exocytosis, I here evaluate the plausibility of these approaches. I conclude that Heisenbergian uncertainty is too small to affect synaptic function, and that amplification by chaos or by other means does not provide a solution to this problem. Furthermore, even if Heisenbergian effects did modify brain functioning, the changes would be swamped by those due to thermal noise. Cells and neural circuits have powerful noise-resistance mechanisms, that are adequate protection against thermal noise and must therefore be more than sufficient to buffer against Heisenbergian effects. Other forms of quantum indeterminism must be considered, because these can be much greater than Heisenbergian uncertainty, but these have not so far been shown to play a role in the brain. 相似文献