ABSTRACTPerceived heaviness is a function of both the muscle activity used to wield an object and the resulting movement. Wielding reveals invariant properties of the effector-object system, such as rotational inertia. Recent research has proposed a psychophysiological mechanism for perceiving the heaviness of a handheld object through dynamic touch that captures how arm muscle activity and angular movement combined reveal this invariance (Waddell, Fine, Likens, Amazeen & Amazeen, 2016Waddell, M. L., Fine, J. M., Likens, A. D., Amazeen, E. L., & Amazeen, P. G. (2016). Perceived heaviness in the context of Newton's Second Law: Combined effects of muscle activity and lifting kinematics. Journal of Experimental Psychology: Human Perception and Performance, 42, 363–374.[Crossref], [PubMed], [Web of Science ®], [Google Scholar]). The current study extends this hypothesis by investigating the dynamics of heaviness perception with the leg. Participants lifted objects of varying mass with knee extension lifts while reporting perceived heaviness. During each lift, the electromyogram (EMG) was recorded from the quadriceps, and peak angular acceleration was recorded about the knee. The resulting psychophysiological function revealed the hypothesized ratio of muscle activity to movement, similar to that found in Waddell et al. (2016)Waddell, M. L., Fine, J. M., Likens, A. D., Amazeen, E. L., & Amazeen, P. G. (2016). Perceived heaviness in the context of Newton's Second Law: Combined effects of muscle activity and lifting kinematics. Journal of Experimental Psychology: Human Perception and Performance, 42, 363–374.[Crossref], [PubMed], [Web of Science ®], [Google Scholar]. This suggests that the dynamics for heaviness perception in the leg is similar to that shown in the arm in previous work. 相似文献
Sansone, Weir, Harpster, and Morgan (1992) found that individuals intentionally regulated their interest in an activity when they had both the need (the task was boring) and a reason to exert the effort (an ostensible health benefit). The present study examined Hardiness and Conscientiousness as moderators of this self-regulatory process when individuals had the option of quitting in addition to the options of persisting and of engaging in interest-enhancing strategies. Undergraduates performed a boring copying activity under instructions to stop when they felt they could evaluate the task. Half were told that their evaluations would help researchers develop good jobs for others (Benefit). Results indicated high hardy individuals copied more letters when they were provided the additional Benefit information, and this effect was mediated through their attempt to make the task more interesting. High conscientious individuals persisted longer than individuals lower in conscientiousness independently of the benefit manipulation or strategy use. Implications of individual differences in self-regulation of motivation are discussed. 相似文献
Based on anticipatory looking and reactions to violations of expected events, infants have been credited with 'theory of mind' (ToM) knowledge that a person's search behaviour for an object will be guided by true or false beliefs about the object's location. However, little is known about the preconditions for looking patterns consistent with belief attribution in infants. In this study, we compared the performance of 17- to 26-month-olds on anticipatory looking in ToM tasks. The infants were either hearing or were deaf from hearing families and thus delayed in communicative experience gained from access to language and conversational input. Hearing infants significantly outperformed their deaf counterparts in anticipating the search actions of a cartoon character that held a false belief about a target-object location. By contrast, the performance of the two groups in a true belief condition did not differ significantly. These findings suggest for the first time that access to language and conversational input contributes to early ToM reasoning. 相似文献
The theological classroom is a place where dynamics of diversity and multiculturalism enter not only the understanding and interpretation of the course material, but also the very processes of teaching and learning. But how is one to learn and assess what students and professors are experiencing as cultural differences, and how is one to sort out the personal characteristics from the cultural? This essay, underscoring the importance of asking students about cultural issues, discusses a few such issues via some anecdotal data. 相似文献
Apathy is common in HIV, separable from depression, and has been associated with non-adherence to antiretroviral therapy (ART). We examined the associations between apathy and critical psychological determinants of ART adherence, as per the information-motivation-behavioral model, in 85 persons living with HIV. Apathy was measured using a composite of the apathy subscale of the Frontal Systems Behavioral Scale and the vigor-activation scale of the Profile of Mood States. Independent of major depressive disorder, apathy was related at small-to-medium effect sizes with motivation to adhere and self-efficacy for health-related decision-making and medication management, but not with HIV knowledge or medication management skills. These findings suggest that apathy plays a unique role in several critical health adherence determinants and support the importance of assessment and management of apathy to maximize health outcomes among individuals with HIV disease.
The virtues are under fire. Several decades’ worth of social psychological findings establish a correlation between human behavior and the situation moral agents inhabit, from which a cadre of moral philosophers concludes that most moral agents lack the virtues. Mark Alfano and Christian Miller introduce novel versions of this argument, but they are subject to a fatal dilemma. Alfano and Miller wrongly assume that their requirements for virtue apply universally to moral agents, who vary radically in their psychological, physiological, and personal situations; I call this the ‘content problem.’ More troubling, however, the content problem leads to what I call the ‘structural problem:’ Alfano and Miller each structure their argument against the virtues as a modus tollens argument and, owing to the breadth of the content problem, each must constrain their argument with a ceteris paribus clause. But the ceteris paribus clause precludes each argument’s validity. More important, however, the resulting conception of virtue implicitly endorsed by Alfano and Miller holds that virtues are idealized models; but since idealized models do not even purport accurately to describe (much of) the world, neither novel version of EAV gains any empirical traction against the virtues. The upshot is an old story whose moral has yet, within the empirical study of the virtues, adequately to be internalized: it is imperative that the empirical observation of character traits proceed via longitudinal studies. 相似文献
The present study tested whether baseline perceived social support and social integration predicted baseline and follow-up measures of health-related quality of life for 364 older adults with osteoarthritis. The findings are secondary analyses of a randomized controlled trial of an exercise intervention. Multiple regression analyses indicate that perceived social support was related to baseline measures of functioning in psychological (depressive symptoms, social functioning, and life satisfaction) and physical domains (self-rated disability, observed physical function, and perceived health), after accounting for demographic and clinical status factors. At 18-month follow-up (additionally controlling for exercise intervention and baseline outcomes), social support significantly predicted changes in psychosocial functioning, but was unrelated to changes in self-reported and observed physical health. The findings indicate that social support is an important predictor of long-term psychosocial outcomes, but is less important than baseline clinical status for physical health endpoints in this cohort of older adults. In contrast, social integration was not a consistent predictor of outcomes. 相似文献
Envy of others' material possessions is a potent motivator of consumerism. This makes it a prudentially and morally hazardous emotional response. After outlining these hazards, I present an analysis of the emotion of envy. Envy, I argue, presents things in the following way: the envier lacks some good that her rival possesses; this difference between them is bad for the envier; this difference reflects poorly on the envier's worth; and this difference is undeserved. I then discuss the conditions under which these presentations can be satisfied by differences in material possessions. My conclusion is that no difference in material possessions can simultaneously be all the ways envy presents it as being. Consequently, economic envy is systematically irrational: it is never a warranted response to the distribution of material wealth. Recognising this bolsters the prudential and moral case for reducing the degree to which we feel it and for resisting the inclinations it gives rise to when we do. 相似文献