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221.
In Experiment 1, nonmetric analyses of estimates of similarity and difference were used to generate a scale of loudness for 1,200-Hz tones varying in intensity. For both similarity and difference estimates, loudness was found to grow approximately as the 0.26 power of sound pressure. In Experiment 2, nomnetric analyses of estimates of similarity and difference were used to generate a scale of pitch for 83.3-dB pure tones varying in frequency. For both similarity and difference estimates, pitch was found to vary with frequency in accordance with the mel scale.  相似文献   
222.
With limited efficacy of medications for symptom relief, non-medication treatments may play an important role in the treatment of irritable bowel syndrome (IBS), the most common functional gastrointestinal (GI) disorder. This study aimed to evaluate the efficacy of two self-regulation strategies for symptom relief and mood management in IBS patients. Thirty-five adult participants meeting ROME III criteria for IBS were enrolled, 27 of the 35 participants (77%) completed treatment and pre- and post-treatment visits (89% women, 11% men; M (SD) age = 36 (13)), and 20 of the 27 (74%) completed a 6-month follow-up. Participants were randomly assigned to 16 biweekly group sessions of Iyengar yoga or a walking program. Results indicated a significant group by time interaction on negative affect with the walking treatment showing improvement from pre- to post-treatment when compared to yoga (p < .05). There was no significant group by time effect on IBS severity. Exploratory analyses of secondary outcomes examined change separately for each treatment condition. From pre- to post-treatment, yoga showed significant decreases in IBS severity measures (p < .05), visceral sensitivity (p < .05), and severity of somatic symptoms (p < .05). Walking showed significant decreases in overall GI symptoms (p < .05), negative affect (p < .05), and state anxiety (p < .05). At 6-month follow-up, overall GI symptoms for walking continued to significantly decline, while for yoga, GI symptoms rebounded toward baseline levels (p < .05). When asked about self-regulated home practice at 6 months, significantly more participants in walking than in yoga practiced at least weekly (p < .05). In sum, results suggest that yoga and walking as movement-based self-regulatory behavioral treatments have some differential effects but are both beneficial for IBS patients, though maintenance of a self-regulated walking program may be more feasible and therefore more effective long term.  相似文献   
223.
Black gay and bisexual young men carry a disproportionate burden of HIV in the United States. This study explored Black gay and bisexual young men living with HIV's identification and interpretation of race‐specific cultural messages regarding substance use, sexual activity, and condom use. A total of 36 Black gay and bisexual young men living with HIV (ages 16–24, mean = 20.6 years) from four geographically diverse regions of the United States participated in qualitative in‐depth interviews. Results from this study elucidate the ways in which these young men interpret various forms of race‐specific cultural messages and experiences regarding substance use, sexual activity, and condom use. Participants discussed cultural messages and experiences promoting and discouraging condoms and substance use. Regarding sexual activity, only messages and experiences promoting sex were reported. Across all three categories, messages and experiences promoting risk were predominant. Data further revealed that socially transmitted cultural messages received by young men emanated from multiple sources, such as family, peers, sexual partners, community/neighborhood, and the broader society. Race‐specific cultural messages and experiences should be addressed in interventions for this population, and programs should assist young men in developing a critical consciousness regarding these messages and experiences in order to promote health and well‐being.  相似文献   
224.
On July 12, 1999, our meta-analysis on child sexual abuse published in Psychological Bulletin, one of the American Psychological Association's (APA) premiere journals, was condemned by the U.S. Congress (H. Con. Res. 107). The condemnation followed months of attacks on the article, the APA, and us by various social conservatives and psychoanalytically-oriented clinicians. The American Association for the Advancement of Science (AAAS) was asked by the APA to independently review our article. After considering criticisms of it and the article itself, AAAS declined, but commented that it was the criticisms, not our methods or analyses, that troubled them because these criticisms misrepresented what we wrote. The current article chronicles this whole affair. First, we provide background, explaining why an article such as ours was needed. Then we accurately summarize the article, given that it has been so widely misrepresented. Next we present a chronology of the events leading up to and following the condemnation. We then present and refute all the major criticisms of the article, which have included both methodological and conceptual attacks. Next we discuss the threat to science that these events portend. We conclude by discussing the need to separate moral judgments from scientific research, the conflation of which formed the basis for the distortions and condemnation.  相似文献   
225.
Hood recently reported that preschool children overgeneralized the prediction that falling objects travel in a straight line in spite of extensive counter‐evidence that the object had been deviated to a non‐aligned box by a tube. This behaviour was interpreted as a na?^ve theory of gravity resulting from an overgeneralization derived from experience of falling objects. The current study set out to test whether there was also a significant tendency for 2‐year‐olds to predict that objects travel in a straight line in the horizontal plane. This was achieved by comparing search for an invisibly displaced object moving either vertically or horizontally. The findings confirmed a gravity bias for falling events but did not reveal a similar tendency in the horizontal condition. In the horizontal task, children were as likely to search at an incorrect non‐aligned box as an aligned incorrect box. This supports the interpretation of a na?^ve gravity bias present from at least 2 years of age.  相似文献   
226.
A common way of studying developmental disorders is to adopt a static neuropsychological deficit approach, in which the brain is characterized in terms of a normal brain with some parts or ‘modules’ impaired. In this paper we outline a neuroconstructivist approach in which developmental disorders are viewed as alternative developmental trajectories in the emergence of representations within neural networks. As a concrete instantiation of the assumptions underlying this general approach, we present a number of simulations in an artificial neural network model. The representations that emerge under different architectural, input and developmental timing conditions are then analysed within a multi‐dimensional state space. We explore alternative developmental trajectories in these simulations, demonstrating how initial differences in the same parameter can lead to very different outcomes, and conversely how different starting states can sometimes result in similar end states (phenotypes). We conclude that the assumptions of the neuroconstructivist approach are likely to be more appropriate for analysing developmental deviations in complex dynamic neural networks, such as the human brain.  相似文献   
227.
The nature of students' expectations about university, and their relation with adjustment in university, were examined in a longitudinal investigation. Prior to starting university, participants responded to open‐ended questions regarding their expectations about university. At this time, and during their 1st, 2nd, and 4th years of study, measures of adjustment were completed. Four distinct types of expectations about university were identified: optimistic, prepared, fearful, and complacent. Students whose expectations were fearful reported more stress, depression, and poorer university adjustment than did individuals with other types of expectations, particularly prepared. Moreover, group differences in university adjustment existed throughout students' 4 years at university, and were not attributable to self‐reported previous levels of personal adjustment or academic achievement.  相似文献   
228.
Research in face recognition has largely been divided between those projects concerned with front-end image processing and those projects concerned with memory for familiar people. These perceptual and cognitive programmes of research have proceeded in parallel, with only limited mutual influence. In this paper we present a model of human face recognition which combines both a perceptual and a cognitive component. The perceptual front-end is based on principal components analysis of face images, and the cognitive back-end is based on a simple interactive activation and competition architecture. We demonstrate that this model has a much wider predictive range than either perceptual or cognitive models alone, and we show that this type of combination is necessary in order to analyse some important effects in human face recognition. In sum, the model takes varying images of “known” faces and delivers information about these people.  相似文献   
229.
Bruce Glymou 《Erkenntnis》2000,52(1):29-37
Bogen and Woodward (1988) advance adistinction between data and phenomena. Roughly, theformer are the observations reported by experimentalscientists, the latter are objective, stable featuresof the world to which scientists infer based onpatterns in reliable data. While phenomena areexplained by theories, data are not, and so theempirical basis for an inference to a theory consistsin claims about phenomena. McAllister (1997) hasrecently offered a critique of their version of thisdistinction, offering in its place a version on whichphenomena are theory laden, and hence on which theempirical support for inferences to theories is also,unavoidably, theory laden. In this commentary I arguethat McAllister and Bogen and Woodward are mistaken inthinking that the distinction is necessary, and thatthe empirical support for inferences to theories isnot necessarily theory laden in the way McAllister'saccount entails they are.  相似文献   
230.
The wall of separation between spirituality and medicine is crumbling. Physicians are discovering the importance of prayer, spirituality, and religious participation in enhancing physical and mental health and responding to stressful life circumstances. A new metaphysical model is needed to replace the dualistic Cartesian-Newtonian model that has undergirded modern biomedicine. The process-relational metaphysics, influenced by the seminal thought of Alfred North Whitehead, is a fruitful alternative model for the future partnership of spirituality and medicine. A process-relational metaphysic supports this new partnership through its affirmation of (1) the relational nature of life, (2) the essential relatedness of mind, body, and spirit, (3) the multifactorial nature of causation in terms of health and illness, and (4) the affirmation of creativity and the redefinition of divine and human power in terms of partnership. This new metaphysical foundation provides a basis for including spiritual concerns in the care of patients, the education of physicians, and in professional self-care. Physicians are called to be partners with their patients, nurturing their own spiritual well-being even as they care for the spiritual well-being of their patients.  相似文献   
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