Concurrent Performance of Gunner's and Robotics Operator's Tasks in a Multitasking Environment

In this study, we simulated a generic mounted crew station environment and conducted an experiment to examine the workload and performance of the combined position of gunner and robotics operator. Results showed that participants' gunnery task performances degraded significantly when he had to concurrently monitor, manage, or teleoperate an unmanned ground vehicle compared to the gunnery single task condition. For the robotics tasks, participants had the lowest performance when using the semi-autonomous robot, indicating overreliance on the aided target recognition capabilities available when task load was heavy (i.e., concurrent performance of the gunnery task). Participants' perceived workload increased consistently as the concurrent task conditions became more challenging. Individual difference factors such as spatial ability and perceived attentional control were found to correlate significantly with some of the performance measures. Implications for military personnel selection were discussed.     

The role of local and distal landmarks in the development of object location memory

To locate objects in the environment, animals and humans use visual and nonvisual information. We were interested in children's ability to relocate an object on the basis of self-motion and local and distal color cues for orientation. Five- to 9-year-old children were tested on an object location memory task in which, between presentation and test, the availability of local and distal cues was manipulated. Additionally, participants' viewpoint could be changed. We used a Bayesian model selection approach to compare our hypotheses. We found that, to remain oriented in space, 5-year-olds benefit from visual information in general, 7-year-olds benefit from visual cues when a viewpoint change takes place, and 9-year-olds do not benefit from the availability of visual cues for orientation but rely on self-movement cues instead. Results are discussed in terms of the adaptive combination model (Newcombe & Huttenlocher, 2006).     

Chinese values in Singapore: Traditional and modern

A series of three studies was conducted to test the internal structure of the Chinese value hierarchy (CVH) in Singapore. Study 1 identified the empirically best–fit model with six factors: Prudence, Industry, Civic–Harmony, Moral Development, Social Power and Moderation. Relative magnitudes and interfactor correlations suggested that these factors could be further grouped into two superordinate clusters: (i) The Modern factor, with significantly higher magnitude, consisted of Prudence, Industry, Civic–Harmony and Moral Development; and (ii) the Tradition factor, with lower magnitude, consisted of Social Power and Moderation. Study 2 surveyed university students with differential preference for language usages: English or Chinese. Both language groups were equally high on the Modern factor, but the Chinese–language–preferred group showed a significantly higher endorsement for the Tradition factor, Chinese Worldview (CWV) and Chinese Health Beliefs (CHB). Further convergent validation for the Modern and the Tradition factors was provided by investigating their correlations with traditional Chinese beliefs and practices for the two language groups separately. Study 3 tested generation differences in CVH. University participants (Self) were compared with their parents (Parents) and friends (Friends). There were no differences between Self and Friends on both the Modern and Tradition factors, CWV and individual differences of modernity. Parents and Self did not differ on individual differences of modernity. Parents, however, were higher on the Modern factor, the Tradition factor and CWV. Results were discussed to support the concept of 'multiple modernity' (Tu, 1900) in Asian societies, and the 'revised convergence hypothesis' proposed by Yang (1988).     

Where Are We Now? Some Thoughts on the Current Scene

Although not as yet fully implemented, laws, executive orders, administrative rulings, and court decisions are now available for dealing with the more blatant forms of discrimination against women. But we do not as yet have protection against the subtler forms—the exclusionary stag effect, for example, and the putdown—which can have equally damaging effects. Research is called for to document just how the self-image of women is injured by these forms of behavior and how their professional careers are prejudiced by them. Collective coping mechanisms are called for. Recourse to the courts may be called for in some cases, but in others these subtle forms of bahvior that have discriminatory consequences for women are inadvertent and require primarily that we call attention to them.     

Perceptions of goal-directed activities of optimists and pessimists: a personal projects analysis

In this research the authors examined the relationship between optimism and personal projects in a community sample. Three hundred twenty-five community volunteers completed the Personal Projects Analysis (PPA; B. R. Little, 1983) and measures of self-reported optimism and sociodemographic information. Participants who reported high levels of optimism rated their idiosyncratic personal goals significantly higher on PPA factors reflecting Positive Identity Fulfillment and Mastery-Control and significantly lower on the factor reflecting Perceived Strain than did participants who reported low levels of optimism. After the impact of age and education on optimism were statistically controlled, the Perceived Strain and Mastery-Control factors made significant contributions to the prediction of self-reported optimism in both initial and cross-validation samples. Findings indicate that highly optimistic individuals can be differentiated from their less optimistic peers on the basis of their perceptions of idiosyncratic goals. From an expectancy valence perspective, such differences have a direct bearing on individuals' behavior and may be associated with outcomes such as learned helplessness and procrastination.