Surveying psychology's public image.

Psychologists have been interested in their public image since the organization of the American Psychological Association nearly 100 yrs ago. Yet formal surveys of the public's opinions about and understanding of psychology are more recent, dating from the 1940's. The published and unpublished surveys of psychology's public image to date are reviewed, and data from a recent telephone survey of 201 respondents (aged 18+ yrs) in 4 metropolitan areas are presented. Like earlier surveys, results of the present survey show that most people hold generally favorable attitudes toward psychology but are only marginally sophisticated in their understanding of the field. Specifically, the public is somewhat aware of both the scientific and clinical endeavors of psychologists. However, the public has virtually no understanding of the impact of psychology on their lives. These findings are compared with earlier findings. (47 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Microbiological deterioration of rubbers and plastics

The effects of micro-organisms on rubbers and plastics are reviewed, with reference to the chemical nature of the polymers and their possible additives. The confused and sometimes contradictory nature of the evidence is indicated, and it is concluded that both synthetic and naturally-occurring polymers are attacked but it is not possible at this stage to say which chemical groups in each polymer are susceptible.     

Locus of control for affiliation and behavior in social interactions.

In 2 studies, 106 undergraduates completed the Multidimensional–Multiattributional Causality Scale and were observed as they discussed their experiences with each other after having viewed a stressful film. In the 1st study, listening behavior was used as an indication of social skill and responsiveness. As had been found in earlier studies, internals for affiliation (Ss who attribute social consequences to internal characteristics) were more attentive listeners than were externals for affiliation (those who attribute social outcomes to external characteristics). In the 2nd study, several interaction variables were observed and a composite index of social skill was created from them. Again, those who were internal for affiliation proved to be the more skilled social interactors. In contrast, locus of control for achievement proved to be less strongly related to the social criteria in both studies. Results support the hypothesized connection between affiliation locus of control, social sensitivity, and social skill. (20 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Role of marital quality in toddler development.

Examined associations among contemporaneous measures of marital quality, parenting attitudes and behavior, and toddler development in 75 2-parent families with a 20-mo-old child. Child–mother and child–father attachment was assessed in the Strange Situation procedure, and child task behavior was rated during a problem-solving task. Parents completed the Dyadic Adjustment Scale and questionnaires concerning parenting attitudes and perceptions. Independent observations were conducted for parental behavioral sensitivity and couple marital harmony. Findings support the hypothesis that good marital quality would be associated with optimal toddler functioning and sensitive parenting. The magnitude of effect was greater for marriage–parenting associations than for marriage–child associations. Differences in patterns of intercorrelation for mothers and fathers were found and direct and indirect associations between marital quality, parenting, and child development are discussed. (36 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Spatial ability subfactors and their influences on a computer-based information search task

OBJECTIVE: The present study examined the relationship between two distinct subfactors of spatial ability and performance in an information search task modeled on browsing the Web. BACKGROUND: Previous studies have found relationships between various measures of spatial ability and performance in a wide variety of computer-based tasks. METHOD: In the search task 101 participants (18-29 years of age) searched for the answer to a question by navigating the system. They completed the experimental task as well as a battery of cognitive ability measures that included two different measures of spatial ability. RESULTS: The results indicate that spatial orientation ability was related to performance with tasks that were high in their navigational requirement (engendered by the use of a novel aid), whereas spatial visualization was unrelated to performance in any task condition. CONCLUSION: A closer inspection of the cognitive requirements of a task may reveal what interventions could be most useful when designing computer systems or developing training programs. APPLICATION: Given the unique differences between the different spatial abilities, the current results suggest the design of navigational aids that place less demand on spatial orientation ability.     

Web-based information search and retrieval: effects of strategy use and age on search success

OBJECTIVE: The purpose of this study was to investigate the relationship between strategy use and search success on the World Wide Web (i.e., the Web) for experienced Web users. An additional goal was to extend understanding of how the age of the searcher may influence strategy use. BACKGROUND: Current investigations of information search and retrieval on the Web have provided an incomplete picture of Web strategy use because participants have not been given the opportunity to demonstrate their knowledge of Web strategies while also searching for information on the Web. METHODS: Using both behavioral and knowledge-engineering methods, we investigated searching behavior and system knowledge for 16 younger adults (M = 20.88 years of age) and 16 older adults (M = 67.88 years). RESULTS: Older adults were less successful than younger adults in finding correct answers to the search tasks. Knowledge engineering revealed that the age-related effect resulted from ineffective search strategies and amount of Web experience rather than age per se. Our analysis led to the development of a decision-action diagram representing search behavior for both age groups. CONCLUSION: Older adults had more difficulty than younger adults when searching for information on the Web. However, this difficulty was related to the selection of inefficient search strategies, which may have been attributable to a lack of knowledge about available Web search strategies. APPLICATION: Actual or potential applications of this research include training Web users to search more effectively and suggestions to improve the design of search engines.     

Sleep and need for recovery in shift workers: do chronotype and age matter?

This study examined associations of chronotype and age with shift-specific assessments of main sleep duration, sleep quality and need for recovery in a cross-sectional study among N = 261 industrial shift workers (96.6% male). Logistic regression analyses were used, adjusted for gender, lifestyle, health, nap behaviour, season of assessment and shift schedule. Shift workers with latest versus earliest chronotype reported a shorter sleep duration (OR 11.68, 95% CI 3.31–41.17) and more awakenings complaints (OR 4.84, 95% CI 4.45–11.92) during morning shift periods. No associations were found between chronotype, sleep and need for recovery during evening and night shift periods. For age, no associations were found with any of the shift-specific outcome measures. The results stress the importance of including the concept of chronotype in shift work research and scheduling beyond the concept of age. Longitudinal research using shift-specific assessments of sleep and need for recovery are needed to confirm these results.

Practitioner Summary: Chronotype seems to better explain individual differences in sleep than age. In view of ageing societies, it might therefore be worthwhile to further examine the application of chronotype for individualised shift work schedules to facilitate healthy and sustainable employment.     

Climate Change and Resource Management in the Columbia River Basin

Abstract

Scenarios of global climate change were examined to see what impacts they might have on transboundary water management in the Columbia River basin. Scenario changes in natural streamflow were estimated using a basin hydrology model. These scenarios tended to show earlier seasonal peaks, with possible reductions in total annual flow and lower minimum flows. Impacts and adaptation responses to the natural streamflow scenarios were determined through two exercises: (a) estimations of system reliability using a reservoir model with performance measures and (b) interviews with water managers and other stakeholders in the Canadian portion of the basin. Results from the two exercises were similar, suggesting a tendency towards reduced reliability to meet objectives for power production, fisheries, and agriculture. Reliability to meet flood control objectives would be relatively unchanged in some scenarios but reduced in others. This exercise suggests that despite the high level of development and management in the Columbia, vulnerabilities would still exist, and impacts could still occur in scenarios of natural streamflow changes caused by global climate change. Many of these would be indirect, reflecting the complex relationship between the region and its climate.     

Semi-parametric Estimation for Selecting Optimal Threshold of Extreme Rainfall Events

The two primary approaches of extreme events analysis are annual maximum series (AMS), which fits Generalized Extreme Value (GEV) distribution to the yearly peaks of events in the observation period, and partial duration series (PDS), which fits Generalized Pareto (GP) distribution to the peaks of events that exceed a given threshold. The PDS is able to reduce sampling uncertainty and is more useful in dealing with extreme values and asymmetries in the tails, but the optimal threshold is required. The objective of this study is to compare and determine the best method for selecting the optimal threshold of PDS using the hourly, 12-h and 24-h aggregated data of rainfall time series in Peninsular Malaysia. The choice of the threshold, or the number of largest order statistics, can be estimated by the parameters of extreme events. In this study, thirteen semi-parametric estimators are considered and applied to estimate the shape parameter or extreme value index (EVI). A semi-parametric bootstrap is then used to estimate the mean square error (MSE) of the estimator at each threshold and the optimal threshold is selected based on the smallest MSE. Based on the smallest MSE, the majority of stations and data durations favor the Adapted Hill estimator, followed by the QQ, Hill and Moment Ratio 1 estimators. Therefore, this study proves that the application of different estimators on real data may result in different optimal values of threshold and the choice of the best method is very much data-dependent.