When accepting a parcel from another person, we are able to use information about that person’s movement to estimate in advance
the weight of the parcel, that is, to judge its weight from observed action. Perceptual weight judgment provides a powerful
method to study our interpretation of other people’s actions, but it is not known what sources of information are used in
judging weight. We have manipulated full form videos to obtain precise control of the perceived kinematics of a box lifting
action, and use this technique to explore the kinematic cues that affect weight judgment. We find that observers rely most
on the duration of the lifting movement to judge weight, and make less use of the durations of the grasp phase, when the box
is first gripped, or the place phase, when the box is put down. These findings can be compared to the kinematics of natural
box lifting behaviour, where we find that the duration of the grasp component is the best predictor of true box weight. The
lack of accord between the optimal cues predicted by the natural behaviour and the cues actually used in the perceptual task
has implications for our understanding of action observation in terms of a motor simulation. The differences between perceptual
and motor behaviour are evidence against a strong version of the motor simulation hypothesis.
A. F. de C. Hamilton and D. W. Joyce have contributed equally to this work. 相似文献
The ability of cows (Bos taurus) to perceive depth has never been experimentally investigated. If cows can perceive depth, the milking pit in commercial milking facilities may be fear provoking for dairy cows, as past research has shown that most land-dwelling species possess an instinctive fear of heights. In the current study, 12 dairy heifers (1-year-old cows) were exposed to a milking pit (depth-exposed group) and 13 heifers (control group) were exposed to a standard change in the environment while they moved through a milking facility over a 5-day treatment period. Heifers in the depth-exposed group showed a higher heart rate (p < .05) and stopped more often (p < .05) than did those in the control group; persistence of heart rate but not of behavioral responses on repeated exposures indicated that some habituation to the depth stimulus had occurred. Depth exposure had no effect on cortisol concentrations or on ease of handling. These results indicate that heifers responded differently to a change in depth than they did to a standard change in the environment and provide evidence of both depth perception and acute fear of heights in cows. 相似文献
Although often ignored, establishing and maintaining congruence in team members’ temporal perceptions are consequential tasks that deserve research attention. Integrating research on team cognition and temporality, this study operationalized the notion of a temporal team mental model (TMM) at two points in time using two measurement methods. Ninety eight three-person teams participated in a computerized team simulation designed to mimic emergency crisis management situations in a distributed team environment. The results showed that temporal TMMs measured via concept maps and pairwise ratings each positively contributed uniquely to team performance beyond traditionally measured taskwork and teamwork content domains. In addition, temporal TMMs assessed later in teams’ development exerted stronger effects on team performance than those assessed earlier. The results provide support for the continued examination of temporal TMM similarity in future research. 相似文献
Objectives. To examine motivational and volitional factors for hand washing in young adults, using the Health Action Process Approach (HAPA) as a theoretical framework.
Design. In a longitudinal design with two measurement points, six weeks apart, university students (N = 440) completed paper-based questionnaires.
Main outcome measures. Prior hand washing frequency, self-efficacy, outcome expectancies, intention and action planning were measured at baseline, and coping planning, action control and hand washing frequency were measured at follow-up.
Results. A theory-based structural equation model was specified. In line with the HAPA, the motivational factors of self-efficacy and outcome expectancies predicted intention, whereas the volitional factors of planning and action control mediated between intention and changes in hand washing frequency. Action control was confirmed as the most proximal factor on hand washing behaviour, thus representing a bridge of the planning–behaviour gap.
Conclusions. Both motivational and volitional processes are important to consider in the improvement of hand hygiene practices. Moreover, the statistically significant effects for planning and action control illustrate the importance of these key self-regulatory factors in the prediction of hand hygiene. The current study highlights the importance of adopting models that account for motivational and volitional factors to better understand hand washing behaviour. 相似文献
Episodic-like memory tests often aid in determining an animal’s ability to recall the what, where, and which (context) of an event. To date, this type of memory has been demonstrated in humans, wild chacma baboons, corvids (Scrub jays), humming birds, mice, rats, Yucatan minipigs, and cuttlefish. The potential for this type of memory in zebrafish remains unexplored even though they are quickly becoming an essential model organism for the study of a variety of human cognitive and mental disorders. Here we explore the episodic-like capabilities of zebrafish (Danio rerio) in a previously established mammalian memory paradigm. We demonstrate that when zebrafish were presented with a familiar object in a familiar context but a novel location within that context, they spend more time in the novel quadrant. Thus, zebrafish display episodic-like memory as they remember what object they saw, where they saw it (quadrant location), and on whichoccasion (yellow or blue walls) it was presented. 相似文献