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171.
172.
In order to safely negotiate cluttered and dangerous environments, firefighters must efficiently and effectively make affordance judgments. Failure to do so could put them at risk for slips, trips, and falls, which are major causes of injuries for firefighters. We examined how well firefighters were able to perceive their obstacle crossing abilities while wearing firefighting protective equipment. Firefighters were asked to judge whether they could cross over, under, and through different obstacles that simulated idealized fireground situations. Perceptual judgment errors were found for each obstacle type, the largest occurring with an overestimation of ability to pass under an obstacle. Years of experience had a moderate positive correlation with absolute judgment error in the “over” and “under” obstacles. Overall, a general lack of awareness of their personal protective equipment for obstacle crossing ability was observed. A better understanding of how to reduce judgment error while wearing firefighter protective gear would likely decrease the risk of injuries on the fireground. 相似文献
173.
Robert L. Whitwell Gavin Buckingham James T. Enns Philippe A. Chouinard Melvyn A. Goodale 《Psychonomic bulletin & review》2016,23(4):1157-1163
It has been demonstrated that pictorial illusions have a smaller influence on grasping than they do on perceptual judgments. Yet to date this work has not considered the reduced influence of an illusion as it is measured repeatedly. Here we studied this decrement in the context of a Ponzo illusion to further characterize the dissociation between vision for perception and for action. Participants first manually estimated the lengths of single targets in a Ponzo display with their thumb and index finger, then actually grasped these targets in another series of trials, and then manually estimated the target lengths again in a final set of trials. The results showed that although the perceptual estimates and grasp apertures were equally sensitive to real differences in target length on the initial trials, only the perceptual estimates remained biased by the illusion over repeated measurements. In contrast, the illusion’s effect on the grasps decreased rapidly, vanishing entirely after only a few trials. Interestingly, a closer examination of the grasp data revealed that this initial effect was driven largely by undersizing the grip aperture for the display configuration in which the target was positioned between the diverging background lines (i.e., when the targets appeared to be shorter than they really were). This asymmetry between grasping apparently shorter and longer targets suggests that the sensorimotor system may initially treat the edges of the configuration as obstacles to be avoided. This finding highlights the sensorimotor system’s ability to rapidly update motor programs through error feedback, manifesting as an immunity to the effects of illusion displays even after only a few trials. 相似文献
174.
Hong Kong (HK) and the People’s Republic of China (PRC), while sharing historic cultural roots, have different policies for and practices of educational assessment. Student conceptions of assessment function to guide individual behaviour in response to the functions, purposes, and consequences of assessments. A new self-report questionnaire was developed to account for attitudes and beliefs detected in qualitative and pilot survey studies. In a two-group confirmatory factor analysis, an eight-factor solution, in which seven factors were dependent on a higher order factor (i.e., School Quality), was found with good fit. The seven factors were named: Societal Uses, Class Benefits, Accuracy, Negative Aspects, Teacher Use, Family Effects, and Competition. Invariance testing showed that regression weights were not equivalent between the PRC and HK students, though they were among PRC pre-degree and postgraduate students. There were statistically significant differences in factor mean scores between the HK and PRC groups. Conventional Chinese cultural norms were less explanatory of results than the effect of institutional assessment policies and practices in each jurisdiction. 相似文献
175.
Jane B. Childers Rebecca Parrish Christina V. Olson Clare Burch Gavin Fung Kevin P. McIntyre 《Journal of cognition and development》2016,17(1):41-66
An important problem verb learners must solve is how to extend verbs. Children could use cross-situational information to guide their extensions; however, comparing events is difficult. In 2 studies, researchers tested whether children benefit from initially seeing a pair of similar events (“progressive alignment”) while learning new verbs and whether this influence changes with age. In Study 1, 2.5- and 3.5-year-old children participated in an interactive task. Children who saw a pair of similar events and then varied events were able to extend verbs at test and differed from a control group; children who saw 2 pairs of varied events did not differ from the control group. In Study 2, events were presented on a monitor. Following the initial pair of events that varied by condition, a Tobii x120 eye tracker recorded 2.5-, 3.5-, and 4.5-year-olds’ fixations to specific elements of events (areas of interest) during the 2nd pair of events, which were the same across conditions. After seeing the pair of events that were highly similar, 2.5-year-olds showed significantly longer fixation durations to agents and to affected objects as compared with the all-varied condition. At test, 3.5-year-olds were able to extend the verb, but only in the progressive alignment condition. These results are important because they show children’s visual attention to relevant elements in dynamic events is influenced by their prior comparison experience, and they show that young children benefit from seeing similar events as they learn to compare events to each other. 相似文献
176.
Gavin Buckingham Aimee MacDonald 《Quarterly journal of experimental psychology (2006)》2016,69(9):1831-1841
In the size–weight illusion, small objects feel heavier than identically weighted larger objects. This illusion is thought to be a consequence of how one's prior expectations can influence conscious perception—lifters expect the large object to outweigh the small object and subsequently experience it as feeling lighter than they expected it to be. Here, we directly examined how a familiar object's identity can affect how heavy someone expects it to be, and how these expectations will influence subsequent perceptions of heaviness. We describe two novel weight illusions induced with familiar objects. In one condition, participants judged the weight of a set of similar-size objects with very different natural weights (a polystyrene sphere, a tennis ball, and a cricket ball), which had all been adjusted to weigh the same amount as one another. In this condition, participants experienced a small, but reliable, weight illusion, with the lightest looking ball feeling heavier than the heaviest looking ball. In the other condition, participants judged the weights of a different set of balls, which were different sizes, but similar natural weights, to one another (a golf ball, a foam soccer ball, and an inflated beach ball). Again, participants experienced a perceptual illusion, but in the opposite direction. Surprisingly, participant's perceptions matched, rather than contrasted with, their explicit expectations such that, even though they expected the golf ball to outweigh the beach ball they perceived the golf ball as feeling heavier than the beach ball. The effect of object mass appeared to dominate the effect of conscious expectations, suggesting that contrasting expectations of heaviness are not necessary to experience weight illusions and that current models of this robust perceptual effect must be revised. 相似文献
177.
The Role of Postformal Cognitive Development in Death Acceptance 总被引:1,自引:1,他引:0
Jennifer Gavin Jennings M. Paz Galupo Kelly B. Cartwright 《Journal of Adult Development》2009,16(3):166-172
This research is the first to test the relation between postformal complex thought (PFT) and death acceptance. College students
(N = 225) completed the PFT questionnaire (Cartwright et al., J Adult Dev, 2009), the Need for Cognition scale (Cacioppo et al., J Personality Assess 48:3, 1984), and Klug’s Death Acceptance Scale, comprised of death integration and confrontation scales (Klug and Sinha, Omega 18:229–235,
1987). A series of hierarchical regression analyses showed PFT made a significant contribution to death acceptance over the contributions
of other cognitive and demographic variables, as predicted. Further, PFT made a significant contribution to death integration
but not to death confrontation. These results are consistent with contemporary theories of adult cognitive development and
PFT. 相似文献
178.
This paper explores the role of emotions in activism. Although, increasingly, researchers have examined what emotions inspire or deter different forms of political and social movement activism, this paper takes a new direction by considering what spaces, practices and emotional stances are necessary to sustain individual and collective resistance in the long-term. We argue that we need to sustain activism through emotional reflexivity, building sustaining spaces to create space for emotion in activism. Using empirical examples from different forms of autonomous (anti-capitalist) activism in Britain, the role and importance of emotions to the sustainability of activism is explored. In particular, we consider the role of different spaces in sustaining activists through the cycles of protest, what spaces of activism can be opened up by a closer attention to emotions, and how the spaces in which protest and other activist practices take place shape the emotional and affective engagements of participants. As autonomous forms of activism attempt to prefiguratively enact new post-capitalist social relations in the here and now, we suggest there is still some way to go in changing affective relationships within many of these groups. 相似文献
179.
180.
Richard Joiner Jeff Gavin Jill Duffield Mark Brosnan Charles Crook Alan Durndell Pam Maras Jane Miller Adrian J Scott Peter Lovatt 《Cyberpsychology & behavior》2005,8(4):371-378
This paper reports a study that investigated the effects of gender, Internet anxiety, and Internet identification on use of the Internet. The study involved 608 undergraduate students (490 females and 118 males). We surveyed the students' experience with the Internet, as well as their levels of Internet anxiety and Internet identification. We found a number of gender differences in participants' use of the Internet. Males were proportionally more likely to have their own web page than were females. They used the Internet more than females; in particular, they were more likely to use game websites, to use other specialist websites, and to download material from the Internet. However, females did not use the Internet for communication more than males. There was a significant positive relationship between Internet identification and total use of the Internet, and a significant negative relationship between Internet anxiety and total use of the Internet. Controlling for Internet identification and Internet anxiety, we found a significant and negative correlation between gender and use of the Internet. In total, all three of our predictors accounted for 40% of the variance in general Internet use: with Internet identification accounting for 26%, Internet anxiety accounting for 11%, and gender accounting for 3%. 相似文献