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121.
Douglas L. Weeks 《Human movement science》1992,11(6)
Coordination of intentional upper limb movement concurrent with supporting postural activity was investigated in adult males under varying task conditions. Seven subjects performed a 60 deg rapid elbow flexion (focal movement) to a target in movement times of 170, 195, or 220 ms while standing. Measurement of center of pressure via a force platform revealed that subjects adopted individual premovement postural preferences such that locus of center of pressure resided in one predominant quadrant of the foot. Each premovement postural preference was accompanied by one most common postural muscle onset sequence as indicated by bilateral EMG analysis of rectus femoris and biceps femoris. In addition, onset times for postural muscles exhibiting anticipatory postural activity occurred earlier relative to biceps branchii as focal movement velocity increased. The finding that each premovement postural condition was accompanied by one particular postural muscle onset sequence suggested that postural synergies were flexibly organized with respect to onset sequence. 相似文献
122.
123.
Investigations into religious attributions have focused on attributer's immediate, proximal causes of events, paying little attention to underlying, distal explanations. In an effort to explain the relatively low incidence of religious attributions and further a new model of proximal-distal attributions, we present two experiments investigating the proximal and distal use of religious and nonreligious supernatural attributions. Participants in both studies were presented a series of sixteen vignettes that varied on several attribution-relevant dimensions. After reading each vignette, subjects gave an initial explanation for the event, and were then probed for any underlying explanations. Experiment 1 used an interview format that allowed participants maximum latitude when explaining the event's outcome. Consistent with our predictions, participants perceived God as having a greater distal than proximal influence, though this difference was not evident for attributions to Satan or nonreligious supernatural agents. Experiment 2 was performed via a microcomputer, with a participant's initial attributional response branching to a set of appropriate distal explanations. Overall, the results suggest that attributer's perceive God working through indirect influences rather than direct intervention, with this effect being moderated by the attributer's level of religiosity. This pattern was evident in the use of God as a distal explanation as well as in the distal explanations to proximal attributions to God. 相似文献
124.
Changing Drug Users’ Risk Environments: Peer Health Advocates as Multi-level Community Change Agents
Margaret R. Weeks Mark Convey Julia Dickson-Gomez Jianghong Li Kim Radda Maria Martinez Eduardo Robles 《American journal of community psychology》2009,43(3-4):330-344
Peer delivered, social oriented HIV prevention intervention designs are increasingly popular for addressing broader contexts of health risk beyond a focus on individual factors. Such interventions have the potential to affect multiple social levels of risk and change, including at the individual, network, and community levels, and reflect social ecological principles of interaction across social levels over time. The iterative and feedback dynamic generated by this multi-level effect increases the likelihood for sustained health improvement initiated by those trained to deliver the peer intervention. The Risk Avoidance Partnership (RAP), conducted with heroin and cocaine/crack users in Hartford, Connecticut, exemplified this intervention design and illustrated the multi-level effect on drug users’ risk and harm reduction at the individual level, the social network level, and the larger community level. Implications of the RAP program for designing effective prevention programs and for analyzing long-term change to reduce HIV transmission among high-risk groups are discussed from this ecological and multi-level intervention perspective. 相似文献
125.
In this article we discuss the traditional behavioral models of depression and some of the challenges analyzing a phenomenon with such complex and varied features. We present the traditional model and suggest that it does not capture the complexity of the phenomenon, nor do syndromal models of depression that dominate the mainstream conceptualization of depression. Instead, we emphasize ideographic analysis and present depression as a maladaptive dysregulation of an ultimately adaptive elicited emotional response. We emphasize environmental factors, specifically aversive control and private verbal events, in terms of relational frame theory, that may transform an adaptive response into a maladaptive disorder. We consider the role of negative thought processes and rumination, common and debilitating aspects of depression that have traditionally been neglected by behavior analysts. 相似文献
126.
The purpose of the present study was to investigate methods of measuring individual research productivity for counseling psychologists. Using the 60 members of the Journal of Counseling Psychology editorial board, the authors computed a comparison of 6 popular indices of productivity, revealing considerable levels of positive skewness, kurtosis, and overlap with each other. Combining the strengths of the 6 indices, the authors developed a new productivity index entitled the Integrated Research Productivity Index (IRPI). The IRPI measures individual productivity by statistically combining an individual's author-weighted publications, average times cited by other publications, and years since first publication into a comprehensive score. Productivity values and IRPI scores for 3 groups of counseling psychologists (Tyler Award recipients, Kuder Award recipients, and Division 17 Presidents) were computed to provide evidence of discriminant validity among the indices. In contrast to the other measures examined, the IRPI accounts for productivity per year and years in the field and assesses mean citation count per article as opposed to total citation count, thus yielding similar scores for Tyler (lifetime) and Kuder (early career) research award recipients. (PsycINFO Database Record (c) 2010 APA, all rights reserved). 相似文献
127.
In three experiments, we investigated prior findings that, following some memory tasks, essentially flat d' or forced-choice retention curves are produced. These curves have been interpreted as indicating that forgetting is not present over the intervals examined; however, we propose in this article that forgetting is actually present whenever hit rates and false alarm rates are both declining, despite the result being a flat retention curve. We demonstrate that such curves can be produced using a pair recognition procedure, a plurality discrimination task, and a verbal discrimination task. For all of these tasks, we provide either new evidence or refer to evidence already in the literature that tends to contradict alternative explanations. Then we show how the failure to consider both signal strength and noise has led to distortions in theoretical thinking about forgetting. 相似文献
128.
Winston R. Sieck Edgar C. Merkle Trisha Van Zandt 《Organizational behavior and human decision processes》2007
The ASC model of choice and confidence in general knowledge proposes that respondents first Assess the familiarity of presented options, and then use the high-familiarity option as a retrieval cue to Search memory for the purposes of Constructing an explanation about why that high-familiarity option is true. The ASC process implies that overconfidence results in part from a tendency to fixate on the high-familiarity option, to the neglect of the other option. If this implication is true, then judgment tasks requiring respondents to evaluate each option independently should result in reduced overconfidence as compared with standard judgment tasks. Two experiments tested this implication, and found that confidence and overconfidence were reduced when respondents evaluated options independently. The findings support the proposal that option fixation contributes to overconfidence, and also clarify the limitations of random error explanations of overconfidence. 相似文献
129.
Welsh TN Lyons J Weeks DJ Anson JG Chua R Mendoza J Elliott D 《Psychonomic bulletin & review》2007,14(5):950-956
Inhibition of return (IOR) has been shown to occur when an individual returns to a target location (within-person IOR) and
when an individual moves to a location just engaged by another individual (between-person IOR). Although within- and between-person
IOR likely result from the same inhibitory mechanisms, different processes must activate these mechanisms following the performance
and observation of action. Consistent with the suggestion that the mirror neuron system may be responsible for activating
the inhibitory mechanisms behind IOR on observation trials, between-person IOR was only detected under restricted viewing
conditions known to activate mirror neurons. These results indicate that mirror neuron system may be involved in both higher-order
and automatic cognitive behavior. 相似文献
130.