The roles of static depth information and object-image relative motion in perception of heading

In a series of 6 experiments, two hypotheses were tested: that nominal heading perception is determined by the relative motion of images of objects positioned at different depths (R. F. Wang & J. E. Cutting 1999) and that static depth information contributes to this determination. By manipulating static depth information while holding retinal-image motion constant during  simulated self-movement, the authors found that static depth information played a role in determining perceived heading. Some support was also found for the involvement of R. F. Wang and J. E. Cutting’s (1999) categories of object-image relative motion in determining perceived heading. However, results suggested an unexpected functional dominance of information about heading relative to apparently near objects.

The roles of object-image relative motion and static depth information in the perception of heading

Investigates visual information that enables human to effectively guide their movement through the environment. This problem is fundamental to the study of human behaviour, since survival is contingent upon the acquisition of resources that lie in different locations throughout the environment.

Psychological correlates of perception of sexual intent in women

In a sample of 183 men and 186 women, the authors assessed (a) the relative contributions of gender and level of nonverbal social cues to the perception of a female actor's sexual intent during a videotaped social interaction with a man and (b) the association between those variables and personality traits implicated in faulty sexual-information processing. The authors assessed those variables while the participants viewed 1 of 3 film segments depicting a female-male interaction. The authors experimentally manipulated eye contact, touch, physical proximity, and female clothing. At all levels of those nonverbal cues, the men perceived more sexual intent in the female actor than did the women. The perception of the female actor's sexual intent increased as the nonverbal cues in the film segments were magnified: Both actors displayed more eye contact, touch, and physical proximity, and the female actor wore more revealing clothing. Relative to the women, the men demonstrated greater sexual preoccupation and reduced sociosexual effectiveness, variables associated with inferring greater sexual intent in the female actor.

Association between perception of fault for the crash and function, return to work and health status 1 year after road traffic injury: a registry-based cohort study

Objectives To establish the association between the patient's perception of fault for the crash and 12-month outcomes after non-fatal road traffic injury.Setting Two adult major trauma centres, one regional trauma centre and one metropolitan trauma centre in Victoria, Australia.Participants 2605 adult, orthopaedic trauma patients covered by the state's no-fault third party insurer for road traffic injury, injured between September 2010 and February 2014.Outcome measures EQ-5D-3L, return to work and functional recovery (Glasgow Outcome Scale—Extended score of upper good recovery) at 12 months postinjury.Results After adjusting for key confounders, the adjusted relative risk (ARR) of a functional recovery (0.57, 95% CI 0.46 to 0.69) and return to work (0.92, 95% CI 0.86 to 0.99) were lower for the not at fault compared to the at fault group. The ARR of reporting problems on EQ-5D items was 1.20–1.35 times higher in the not at fault group. Conclusions Patients who were not at fault, or denied being at fault despite a police report of fault, experienced poorer outcomes than the at fault group. Attributing fault to others was associated with poorer outcomes. Interventions to improve coping, or to resolve negative feelings from the crash, could facilitate better outcomes in the future.

The perception of racism in ambiguous scenarios

Recent theorising on the nature of racism suggests that over the last few decades it has come to be expressed in more subtle and ambiguous ways because while many Whites proclaim egalitarian values, their cognitions and behaviour are influenced by prejudices that are buried deep in their psyche. This leads to the possibility that those who perpetrate and those who experience racism may have different interpretations of events that involve racism. Essed (1991) has suggested that because they are exposed to racism systematically, those who experience racism are in a good position to detect it if they have both knowledge of normal behaviour for particular situations, and a general knowledge of racism. Using Essed's model of the assessment of racist events, the descriptions of six videotaped ambiguously racist scenarios given by 40 Caucasian students and 40 Asian students were analysed to determine whether situational or general knowledge of racism was evident. Contrary to expectations, the Asian students, who belong to a group targeted with racism in Australia, were less likely to see racism in the scenarios. Finding the scenarios to be acceptable indicated a lack of situational knowledge and, hence, an inability to use general knowledge of racism if it exists. The role of cultural values in the application of situational knowledge is discussed, and further empirical investigations of Essed's model are proposed.

Visual perception of action categories and the "bowl-throw" decision in cricket.

Cricket umpires, cricket bowlers, and physical education students (who were knowledgeable about the rules of cricket), were shown 72 videotaped point-light displays of cricket deliveries with varying extents of elbow flexion such that they ranged from highly “bowl-like” to highly “throw-like”. The observers made a bowl-throw decision about each display, and the umpires and bowlers reported their confidence on a 5-point scale. The percentage of displays reported as a “bowl” was 59, 40, and 44 for the umpires, bowlers, and students respectively. Umpires made significantly more bowl decisions than both the bowlers and students, but there was no difference between the latter groups. Umpires were significantly more confident than the bowlers in both their bowl and throw decisions. Thus, in an experimental setting, with no apparent costs or benefits associated with their decision-makin, umpires “called” a bowler significantly less frequently for throwing than other knowledgeable observers. The procedures devised for this experiment demonstrate that psychophysical methods can be applied to the problem of discrete action-category nominations in sport (e.g., bowl or throw, walk or run).

Visual perception of movement kinematics and the acquisition of "action prototypes"

Recognizing a class of movements as belonging to a "nominal" action category, such as walking, running, or throwing, is a fundamental human ability. Three experiments were undertaken to test the hypothesis that common ("prototypical") features of moving displays could be learned by observation. Participants viewed moving stick-figure displays resembling forearm flexion movements in the saggital plane. Four displays (presentation displays) were first presented in which one or more movement dimensions were combined with 2 respective cues: direction (up, down), speed (fast, slow), and extent (long, short). Eight test displays were then shown, and the observer indicated whether each test display was like or unlike those previously seen. The results showed that without corrective feedback, a single cue (e.g., up or down) could be correctly recognized, on average, with the proportion correct between .66 and .87. When two cues were manipulated (e.g., up and slow), recognition accuracy remained high, ranging between .72 and .89. Three-cue displays were also easily identified. These results provide the first empirical demonstration of action-prototype learning for categories of human action and show how apparently complex kinematic patterns can be categorized in terms of common features or cues. It was also shown that probability of correct recognition of kinematic properties was reduced when the set of 4 presentation displays were more variable with respect to their shared kinematic property, such as speed or amplitude. Finally, while not conclusive, the results (from 2 of the 3 experiments) did suggest that similarity (or "likeness") with respect to a common kinematic property (or properties) is more easily recognized than dissimilarity.

The role of local grouping and global orientation contrast in perception of orientation-modulated textures

We explored the contribution to perception of orientation-modulated textures of visual processes selective either for orientation contrast or orientation grouping. To distinguish between these two processes we manipulated the axis of local grouping of texture elements independently of the direction of global orientation modulation. The general question posed was whether visibility of texture structure (measured as threshold for discriminating spatial-frequency of texture structure) is dependent on the magnitude of orientation contrast, strength and direction of local grouping, or some combination of the two. We demonstrated that the factor of primary importance is the amplitude of global orientation contrast rather than the presence of local grouping content. Using orientation-interleaved textures (containing two superimposed textures modulated around orthogonal orientations), we further showed that orientation single-opponent processes are a more likely candidate for detecting orientation contrast than double-opponent processes.

Investigating factors influencing the perception of creativity in web design

In many disciplines, creativity has been recognised as an important part of problem solving. In business, creativity enables the generation of better solutions and provides an opportunity to gain a competitive advantage. In Information Systems (IS) creativity assists developers in finding solutions to difficult problems by helping to efficiently utilise available resources and allows the more effective planning and running of complex projects. One of the most important aspects of IS development is Requirements Engineering (RE), the development activity aimed at understanding the needs and wants of IS customers. While previous RE researchers suggested that creativity is crucial in building high quality information systems, fostering creative outcomes in RE is difficult as it is affected by the multifaceted socioorganisational context within which IS development commonly takes place. This paper reports findings from an empirical study into creativity in RE. Specifically, it reports various contextual factors which were found to influence the creativity of individuals and their teams.

Parents' perception of the quality of life of preschool children at risk or having developmental disabilities.

Despite increased concern for the health related quality of life (HRQOL) of people with disabilities, little is known about the HRQOL of children with developmental disabilities. The present study aimed to explore the HRQOL of children who were at risk or having developmental disabilities in Hong Kong. Using the parent-reported Chinese Pediatric Quality of Life Inventory (PedsQL), the HRQOL of 173 children (2–4 years) with signs of delays in development was contrasted with that of 132 children with typical development. We found that those who exhibited high risk of developing a developmental disability had significantly lower overall well-being (76.3 ± 13.7 vs. 84.2 ± 11.3; p<0.001) and psychosocial health (71.3 ± 15.6 vs. 82.5 ± 12.9; p<0.001) but not necessarily physical health. The findings are consistent with previous findings in children with different disabilities and chronic illnesses. They suggest children at risk or having DDs need help in restoring their quality of life up to the standard experienced by their healthy peers, particular in psychosocial aspects such as social functioning, emotion functioning, and school functioning.

Evidence for crossvergence in the perception of task and contextual performance : a study of western expatriates working in Thailand

The applicability of the Western model of task and contextual performance to the context of Thai and Western managers, professionals and consultants working together in Thailand is addressed in this research. The results show a clear difference in the factor structure of how Western and Thai managers perceive the importance of performance factors. Moreover, the task and contextual factor structure found for Western managers working in a Western culture did not hold for Westerners working within the Thai cultural environment. These findings provide evidence of adaptation by the Westerner to the Thai cultural environment, supporting the notion of crossvergence.

Participation in physical activity : perception of women with a previous history of gestational diabetes

The aim was to explore the perceptions of physical activity among women with previous gestational diabetes mellitus, in the context of preventing Type 2 diabetes mellitus.