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161.
Cone-contrast coordinates have proved useful for representing transient test stimuli used in color vision experiments. These representations automatically take into account the spectral absorption of cones and any Weberian adaptation to steady fields of light. Under these conditions, they also can be interpreted as being an approximation to the incremental cone response. A detailed methodology is presented for making appropriate measurements and calculations of cons contrasts for any light source, especially color monitors. 相似文献
162.
Pinch T 《Science and engineering ethics》2000,6(4):511-523
This paper elaborates on the golem metaphor as a way of understanding uncertainty in science. Its implications for the ethics of communicating science are explored. 相似文献
163.
164.
The present study examined the circumstances pertaining to threat and aggression during soccer matches as experienced by 107 provincial Soccer Association referees. Three sources of aggression were identified—soccer players, coaches/trainers, and spectators—and the main measures included threat and physical and verbal aggression. Several outcomes, including prematch worry and effects on concentration, performance, and motivation, were affected by the incidence of threat and aggression, and these outcomes were found to be affected by the age, degree of experience, and life orientation of the referees. Younger referees were shown to be the most prone to threat and aggression. Referees with a generally pessimistic orientation experienced less motivation, worse performance, and greater problems coping with aggressive behavior from the spectators compared with referees with a generally optimistic orientation. Aggr. Behav. 28:317–327, 2002. © 2002 Wiley‐Liss, Inc. 相似文献
165.
Experiencing two odors as a mixture can later increase their perceived similarity when presented separately. Such an increase in similarity can be used as an implicit measure of how well participants remember the mixture. Three experiments tested the resistance to interference of this effect by first giving participants exposure to two 2-odor mixtures and then presenting each odor from one mixture (interfered pair) separately many times. After the latter interference phase, participants rated the similarity of the two odors in each pair. The experiments varied in terms of the number of initial exposures to the mixtures, the number of odor presentations in the interference phase, and the control conditions employed. No difference in similarity ratings for the interfered and non-interfered pair was found in any experiment. In contrast to the lack of interference with this implicit measure, an explicit measure of memory based on participants’ ratings of odor frequency revealed that they could recall to some degree that the interfered odors had been presented alone in the second phase. These results suggest that implicit memory for odor mixtures is highly resistant to interference and is consistent with a configural encoding account of this effect. 相似文献
166.
The Social Appearance Anxiety Scale (SAAS) was created to measure anxiety about being negatively evaluated by others because of one's overall appearance, including body shape. This study examined the psychometric properties of the SAAS in three large samples of undergraduate students (respective ns = 512, 853, and 541). The SAAS demonstrated a unifactorial structure with high test-retest reliability and internal consistency. The SAAS was positively associated with measures of social anxiety. The SAAS was also related to greater disparity between perceived, actual, and ideal physical attributes, beliefs that one's appearance is inherently flawed and socially unacceptable and that being unattractive is socially deleterious, feelings of unattractiveness, emphasis on appearance and its maintenance, and a preoccupation with being overweight. It was a unique predictor of social anxiety above and beyond negative body image indicators. Findings suggest that the SAAS is a psychometrically valid measure of social anxiety regarding one's overall appearance. 相似文献
167.
University students who were involved in a community service field placement completed the Inventory of Service Experience (ISE), a measure that was designed to assess the extent to which they felt supported by family, friends, and the organizations with which they worked; and the extent to which they experienced positive outcomes (e.g., enhanced skills, a feeling of “having made a difference”) in their community service setting. Students who had a more supportive and positive experience, as assessed by the ISE, were more likely to have continued to work as volunteers in the setting 2 months after they had completed their course requirements. The implications of these results for community service programs are discussed. 相似文献
168.
Structural and Community Change Outcomes of the Connect‐to‐Protect Coalitions: Trials and Triumphs Securing Adolescent Access to HIV Prevention,Testing, and Medical Care 下载免费PDF全文
Robin Lin Miller Sarah J. Reed Danielle Chiaramonte Trevor Strzyzykowski Hannah Spring Ignacio D. Acevedo‐Polakovich Kate Chutuape Bendu Cooper‐Walker Cherrie B. Boyer Jonathan M. Ellen 《American journal of community psychology》2017,60(1-2):199-214
Connect to Protect (C2P), a 10‐year community mobilization effort, pursued the dual aims of creating communities competent to address youth's HIV‐related risks and removing structural barriers to youth health. We used Community Coalition Action Theory (CCAT) to examine the perceived contributions and accomplishments of 14 C2P coalitions. We interviewed 318 key informants, including youth and community leaders, to identify the features of coalitions’ context and operation that facilitated and undermined their ability to achieve structural change and build communities’ capability to manage their local adolescent HIV epidemic effectively. We coded the interviews using an a priori coding scheme informed by CCAT and scholarship on AIDS‐competent communities. We found community mobilization efforts like C2P can contribute to addressing the structural factors that promote HIV‐risk among youth and to community development. We describe how coalition leadership, collaborative synergy, capacity building, and local community context influence coalitions’ ability to successfully implement HIV‐related structural change, demonstrating empirical support for many of CCAT's propositions. We discuss implications for how community mobilization efforts might succeed in laying the foundation for an AIDS‐competent community. 相似文献
169.
Ivo Vlaev Molly J. Crockett Luke Clark Ulrich Müller Trevor W. Robbins 《Cognitive, affective & behavioral neuroscience》2017,17(3):542-553
Serotonin has been implicated in promoting self-control, regulation of hunger and physiological homeostasis, and regulation of caloric intake. However, it remains unclear whether the effects of serotonin on caloric intake reflect purely homeostatic mechanisms, or whether serotonin also modulates cognitive processes involved in dietary decision making. We investigated the effects of an acute dose of the serotonin reuptake inhibitor citalopram on choices between food items that differed along taste and health attributes, compared with placebo and the noradrenaline reuptake inhibitor atomoxetine. Twenty-seven participants attended three sessions and received single doses of atomoxetine, citalopram, and placebo in a double-blind randomised cross-over design. Relative to placebo, citalopram increased choices of more healthy foods over less healthy foods. Citalopram also increased the emphasis on health considerations in decisions. Atomoxetine did not affect decision making relative to placebo. The results support the hypothesis that serotonin may influence food choice by enhancing a focus on long-term goals. The findings are relevant for understanding decisions about food consumption and also for treating health conditions such as eating disorders and obesity. 相似文献
170.
We examined the performance of a group of people with moderately severe Alzheimer's type dementia on a naming task. We found that functional information plays an important role in determining naming performance on both living and non-living things. Perceptual information may play some role in naming living things. We also found some evidence that the semantic category to which an item belongs may also have some effect on naming performance. We argue that both the sensory-functional and domain-specific knowledge hypotheses may be correct: the brain is to some organized on taxonomic grounds, while the semantic representations of living and non-living things depend differentially on perceptual and functional information. These representations can be differentially disrupted by damage to modality-specific stores. At a moderate level of severity, dementia causes global damage that has the effect of disrupting both the localized taxonomic and the modality-specific stores. We discuss the nature of functional information. 相似文献