An inexpensive microcomputer system that measures complex reaction time to a visual stimulus is described. This system can determine the rate of gain of information by utilizing a two-, four-, or eight-choice reaction time task encompassed within the same unit. The system turns on randomly chosen lights and monitors the time required for the subject to depress a corresponding switch. Information describing the stimulus and the subject’s response are printed on a Teletype after each response. 相似文献
Institute of Environmental Stress, University of California, Santa Barbara, California 93106 Three questions were asked: How accurately can lung volumes be reproduced? Do the underlying sensory continua of inspired lung volume subscribe to Weber’s law? Are planned inspirations more accurately reproduced than constrained inspirations? The ability to match inspired lung volume was investigated utilizing the psychophysical method of average error. Fourteen subjects participated in two different conditions in order to answer these questions. The results indicated that inspired lung volumes were reproduced much more accurately than had been previously reported. The sensitivity of change for planned inspirations was identical to that of constrained inspirations (k = 018). However, the absolute threshold was significantly greater for the constrained group. The underlying sensory continua subscribed to a generalized version of Weber’s law. These results are discussed within the context of our present knowledge of receptor information of movement. 相似文献
We are a mother and daughter, both health care professionals, who offer a follow‐up to an article we published twenty years ago about the impact of each other's ongoing, serious medical problems on our relationship. In this article, we contribute a long‐term perspective on the differences between having an illness that is well or poorly understood by medical professionals and the lay community. We also discuss health in the context of identity formation and life stage, as during this interval the daughter left home, graduated college, married, and had two children. Also in this period, the mother survived a third breast cancer and other life‐threatening illnesses. We discuss the impact of these experiences on each other and in other important relationships in our lives. Current discourses on daughters of breast cancer survivors do not fit our experience and we speculate about why our story differs. We find that although we continue to contend with serious medical issues that impact our own, each other's, and our families' lives, nonetheless, our lives are rich, rewarding, and “appropriate” for our life stage. That is the news. 相似文献
Differential‐reinforcement treatments reduce target problem behavior in the short term but at the expense of making it more persistent long term. Basic and translational research based on behavioral momentum theory suggests that combining features of stimuli governing an alternative response with the stimuli governing target responding could make target responding less persistent. However, changes to the alternative stimulus context when combining alternative and target stimuli could diminish the effectiveness of the alternative stimulus in reducing target responding. In an animal model with pigeons, the present study reinforced responding in the presence of target and alternative stimuli. When combining the alternative and target stimuli during extinction, we altered the alternative stimulus through changes in line orientation. We found that (1) combining alternative and target stimuli in extinction more effectively decreased target responding than presenting the target stimulus on its own; (2) combining these stimuli was more effective in decreasing target responding trained with lower reinforcement rates; and (3) changing the alternative stimulus reduced its effectiveness when it was combined with the target stimulus. Therefore, changing alternative stimuli (e.g., therapist, clinical setting) during behavioral treatments that combine alternative and target stimuli could reduce the effectiveness of those treatments in disrupting problem behavior. 相似文献
Objective: Adults with arthritis struggle to meet the physical activity recommendation for disease self-management. Identifying psychosocial factors that differentiate adults who meet (sufficiently active) or do not meet (insufficiently active) the recommendation is needed. This study sought to examine differences in psychosocial responses to arthritis pain among adults who were sufficiently or insufficiently active.
Design: This prospective study included adults with medically diagnosed arthritis (N = 136, Mage = 49.75 ± 13.88 years) who completed two online surveys: (1) baseline: pain and psychosocial responses to pain and (2) two weeks later: physical activity.
Main outcome measures: Psychosocial responses examined in this study were psychological flexibility in response to pain, pain anxiety and maladaptive responses to pain anxiety.
Results: A between-groups MANCOVA comparing sufficiently active (n = 87) to insufficiently active (n = 49) participants on psychosocial responses, after controlling for pain intensity, was significant (p = .005). Follow-up ANOVA’s revealed that sufficiently active participants reported significantly higher psychological flexibility and used maladaptive responses less often compared to insufficiently active participants (p’s < .05).
Conclusions: These findings provide preliminary insight into the psychosocial profile of adults at risk for nonadherence due to their responses to arthritis pain. 相似文献
One of the distinguishing characteristics of Evangelicalism is the conversion story. In this article we focus on the conversion stories of interviewees within the setting of several related Evangelical television programs broadcast in the Netherlands since the 1980s. We argue that the conversion story is construed through a particular view on and practice of authenticity. Thus we see that, in the televised conversion story, modes of authentication are at work in what we analytically distinguish as frames, narratives, and strategies of authentication. We argue that the idea of an authentic transformation has changed from a more fundamentalist mode of authentication, emphasizing the subjection of the self to a particular religious narrative, to a more expressive mode of authentication that emphasizes the exploration of the inner, unique self of the interviewee. 相似文献
The dual aim of this article is to reveal and explain a certain phenomenon of epistemic injustice as manifested in testimonial practice, and to arrive at a characterisation of the anti–prejudicial intellectual virtue that is such as to counteract it. This sort of injustice occurs when prejudice on the part of the hearer leads to the speaker receiving less credibility than he or she deserves. It is suggested that where this phenomenon is systematic it constitutes an important form of oppression. 相似文献
Inconsistent findings regarding the predictive validity of perceptions of risk for a sexually transmitted disease (STD) and HIV may be related to the use of nonspecific measures. The objective of this study was to determine whether more specific measures of perceptions of risk for SI Ds and HIV are associated with intentions to use a condom. We interviewed 490 male and female adolescents, 14 to 19 years old, from a free municipal STD clinic. Controlling for whether a condom was used at last sex, the association between perceptions of risk for an STD and HIV with a casual sex partner and intentions to use a condom with a casual sex partner was significant (βHIV= 14, p < .01, and βSTD=.20, p < .01), as was the association between perceptions of risk for an STD and HIV with a main sex partner and intentions to use a condom with a main sex partner (βHIV= .31, p <.001, and βSTD= .32, p < .001). This supports the continued inclusion of this construct in models of sexual and other health-related behaviors. 相似文献