Illusion magnitude as a function of visual field exposure

Forty-eight right-handed subjects divided into four groups, each consisting of six males and six females, were employed in an investigation of cerebral hemispheric influence on the perception of tachistoscopically presented simultaneous and successive versions of the Mueller-Lyer figure. The simultaneous version exposed in the left visual field resulted in a larger effect than did right visual field exposures. The successive version exposed in the right visual field resulted in a larger illusion magnitude than it did in the left visual field. The magnitude of visual field differences in response to the successive version was greater than visual field differences found in response to the simultaneous version     

Perceived target displacement as a function of field movement and asymmetry

In two experiments induced movement of an object was produced to demonstrate that movement of the background influences the perceived localization of the object in space. The Roelofs (asymmetry) effect could be used to explain only part of the shift in localization in Experiment1. The asymmetry effect was excluded from Experiment2 by the procedure employed. It was concluded that the Roelofs effect is a sufficient, but not necessary, condition for the effects of induced movement to occur, and that relative displacement of the target and background plays an important part in the illusion. Furthermore, it was shown that the effects of induced movement can occur even when the border of the background remains stationary.     

Aging and perceived event structure as a function of modality

The majority of research on situation model processing in older adults has focused on narrative texts. Much of this research has shown that many important aspects of constructing a situation model for a text are preserved and may even improve with age. However, narratives need not be text-based, and little is known as to whether these findings generalize to visually-based narratives. The present study assessed the impact of story modality on event segmentation, which is a basic component of event comprehension. Older and younger adults viewed picture stories or read text versions of them and segmented them into events. There was comparable alignment between the segmentation judgments and a theoretically guided analysis of shifts in situational features across modalities for both populations. These results suggest that situation models provide older adults with a stable basis for event comprehension across different modalities of expereinces.     

Religious Attendance and Volunteering: Testing National Culture as a Boundary Condition

Numerous studies have documented the importance of religion, and especially of religious congregational attendance, in regard to volunteering. Most of these studies focus on individual and contextual factors, usually within one country. Recent studies suggest that the association between religious attendance and volunteering varies among countries. We hypothesize that national culture plays an important role in explaining volunteering mainly as a moderator of the relationship between religious attendance and volunteering, especially on volunteering to help people in need. To support this position, we used individual‐level data from the World Values Survey (WVS) coupled with national data on cultural measures. This enabled assessment of these relationships using a multilevel analysis of individuals nested in countries. We used two models of national culture, Hofstede (1984) and WVS to explain the differences between countries. We found direct relationships between national culture constructs (power distance and survival/self‐expression values) and volunteering. We also found that individualism, power distance, and survival/self‐expression values moderated the effect of religion on volunteering, with a stronger relationship between religious attendance and volunteering in nationalities with self‐expression values, high power distance, and low individualism. Theoretical and practical implications of this approach are discussed.     

Arousal Seeking as a Motivation for Volunteering: MMPI Scores and Central-Nervous-System-Stimulant Use as Suggestive of a Trait

Subjects who indicated that they would volunteer for a psychological experiment reported significantly moTe coffee and caffeine-pill usage than nonvolunteers. Male volunteers more frequently reported cigarette smoking.

In this study, males and females each scored significantly higher on the following MMPI scales: paranoia, schizophrenia, hypomania, cigarette smoking, control and social-participation scales.

Male volunteers scored significantly higher on the masculinity-femininity and dominance scales, while the male nonvolunteers scored higher on the quantitative orientation scale and the social introversion scale.

Female volunteers scored significantly higher on the psychopathic deviate, psychasthenia, F, and manifest-hostility scales; and significantly lower on the lie, defensiveness, and responsibility scales.

The results suggest that a personality trait of arousal seeking could explain some of the MMPI scale score differences as well as the central-nervous-system-stimulant usage.

The results were concordant with most earlier studies in finding differences between volunteers and nonvolunteers on one or more psychological variables.     

Identification reaction time as a function of target and field object orientation

Four experiments were conducted investigating the effects of (a) target versus field object orientation, (b) target upside up versus target upside down and (c) inverting versus noninverting lenses on object identification reaction time. Inverting versus noninverting lenses had no significant effect. Target versus field orientation was significant when objects commonly found on a desk were used. Target upside up versus upside down was not significant. With letters as target and field objects, orientation was not significant. When the target letters were simply inverted (rotated 180 degrees on the horizontal axis), however, forming nonfamiliar patterns, the target upside up versus upside down was significant, with the upside down condition resulting in a longer mean reaction time. The complexity and similarity of target and field objects is offered as an explanation of the results.     

Memory for spatial location: Cue effects as a function of field rotation

We developed theoretical extensions of Huttenlocher, Hedges, and Duncan's (1991) category-adjustment model of human spatial memory to incorporate the use of fuzzy boundariesand cue-determined prototypes. In two experiments, people reproduced locations of dots in a circle, while the number of external reference cues varied. In Experiment 1, the task field was stable and results were consistent with the use of fixed categories unaffected by number of cues. In Experiment 2, the task field was made dynamic by rotation on most trials, with results evaluated for nonrotation trials. The large cue effects observed for angular bias were consistent with the proposed cue-based fuzzy-boundary model. Large cue effects were also observed for absolute error, consistent with a model in which proximity to cues predicts stability of memory. Results point to the key role of orientation to the task environment in determining whether categorical encoding is based on cues.     

Perceived brightness as a function of flash duration in the peripheral visual field

Using a method of direct magnitude estimation, perceived brightness was measured in the dark-adapted eye with brief flashes of varying duration (1–1,000 msec), size (16’–116’), and retinal loci (0°–60°) for the lower photopic luminance levels covering the range between 8.60 and 86 cd/m² in steps of .5 log units. Perceived brightness increased as a function of flash duration as well as luminance up to approximately 100 msec, then remained constant above 100 msec. The enhancement of brightness at about a 50-msec flash duration has been observed not in the fovea but in the periphery. Target size also has been found to be effective on brightness.     

Changes in factor structure of a complex psychomotor test as a function of practice

Scores obtained at eight different stages of practice on the Complex Coordination Test together with scores on 18 reference tests were subjected to a Thurstone Centroid Factor Analysis. Nine meaningful factors were identified in the experimental battery. The results indicated considerable, but systematic, changes in the factor structure of the Complex Coordination Test as practice on the task was continued. The test became less complex (factorially) as practice was continued. Moreover, there was a change in thenature of the factors contributing variance at early and later stages of practice. Implications of the findings are related to certain problems of learning theory, psychomotor test development, and criterion analysis. Skill Components Research Laboratory. The opinions or conclusions contained in this report are those of the authors and do not necessarily reflect the views or indorsement of the Department of the Air Force. The writers are indebted to Dr. Jack A. Adams for the basic data on which this analysis is based.     

Social Networks as a Factor in Volunteering Among Elderly Japanese with Lower Socioeconomic Status

We investigated the effect of social networks on volunteering, which is known to be beneficial for people and society, among elderly Japanese of lower socioeconomic status. Western studies have demonstrated that social networks boost volunteering among wealthy people because of the norm that they should help the less fortunate. However, wealthy East Asians do not share this norm. Therefore, socioeconomic variables and volunteering tend not to be significantly related in Japan. We hypothesized that social networks would be more important to volunteering among the Japanese elderly, especially among people of a lower socioeconomic status. A total of 768 respondents (319 men, 432 women, 17 sex unspecified; M_age = 73.99 years, SD = 7.40 years) completed the survey. The results indicated that social networks were positively related to volunteering only among people with lower financial status. This result suggests that social networks can increase opportunities and help less advantaged elderly people to reap the benefits of volunteering.     

Detection of the sign of expansion as a function of field size and eccentricity

Small optical flow fields are involved in object and shape recognition. These tasks depend on high resolution and low speed of the flow-field elements. Large optical flow fields are involved in tasks such as orientation and navigation, which require flow-field elements to move at high speed. From the above, we would expect to find different behavior of subjects for different parameter ranges of field size and speed of the elements. In this paper, we address the question of whether such different behavior exists for a task that is associated neither with object recognition nor with navigation. We obtained detection thresholds for expansion in the presence of translation for a wide range of field sizes. The same paradigm was used to investigate whether subjects made efficient use of peripheral information. We found viewing-distance invariance, meaning that subjects’ performance scaled with stimulus size. Subjects performed very similarly with and without foveal information.     

The dynamical structure of handball penalty shots as a function of target location

We used principal components analysis (PCA) to investigate variations in the dynamical structure of handball penalty shots as a factor of target location and phase of shot. Participants completed a total of 10 successful shots to each of four target locations in the handball goal. Three dimensional movement time series data were analyzed. Also, data were analyzed across three temporally distinct time windows in line with the evolving kinematic chain. Statistical analyses were undertaken to determine differences across target locations. There were no significant differences between dynamical structures as a factor of target or phase. Covariance between time evolutions as a factor of target reduced in line with the ranking of the component. When shots were analyzed as three distinct time windows, only the low time evolution covariances suggested differences between targets in any time window. Our findings show that the dynamical structure underpinning the handball penalty shot does not differ greatly across locations. However, the time evolution of principal components suggests there are some variations in dynamics which may differentiate shot direction.     

Workplace justice outcomes as a function of adversaries' gender composition: A field assessment

There is extensive documentation that the sex of organizational members may bias a wide variety of managerial decisions and workplace outcomes. While such effects have been persuasively demonstrated, the sex context of these effects has received little attention. It is argued here that it is not merely the sex of the actor, but the nature of the dyadic match (male/male; female/female; male/female; female/male) that is a critical influence on outcomes. This hypothesis is strongly supported by gross differences in workplace justice outcomes based on the dyadic composition of the actors involved in dispute proceedings (n=369) in a field setting. These results are tempered, however, inasmuch as analysis also indicates differences in the severity of disputed issues across these dyadic compositions.