Costs in searching for two targets: dividing search across target types could improve airport security screening

The cost of searching for two visual targets simultaneously was compared against two separate single‐target searches using exposure time and accuracy measures within a staircase procedure. Dual‐target search for all stimuli (colour, shape and orientation) exhibited a loss of accuracy for one target. For orientation and shape, this dual‐target cost in accuracy was extreme, with chance‐level performance on one target. For colour, dual‐target search exhibited an additional cost in search time, with search requiring a longer exposure than the summed time required for two single‐target searches. An additional search‐time cost was also found for orientation targets when irrelevant colour variation was added to the display. In conclusion, dual‐target search for dissimilar targets is accompanied by an accuracy cost. Furthermore, colour variation, whether task‐relevant or not, leads to an additional cost in processing speed. The results suggest that a divided‐effort strategy would improve performance in search tasks such as X‐ray baggage screening. Copyright © 2006 John Wiley & Sons, Ltd.     

Socio-demographic conditions, subjective somatic health, Axis I disorders and personality disorders in the common population: the relationship to quality of life

Quality of life (QOL) was studied in a population of 2,065 subjects in Norway. A broad concept of QOL was applied, including subjective well-being, self-realization, negative life events, and a number of interpersonal relationships. The assessment of QOL, based on interview, was related to a number of socio-demographic variables, subjectively experienced somatic health, the most common Axis I disorders, and all Axis II personality disorders (PDs). The results of multivariate analyses showed that being female and living with a partner in the outskirts of a city and having good physical health are important positive correlates of QOL. Controlling for all these variables, major depression, dysthymic disorder, and somatoform disorders were the Axis I disorders that have a negative statistical effect on global QOL. Specific anxiety disorders did not add to the effects. Among the PDs, avoidant, schizotypal, paranoid, and schizoid PD traits were the most important statistical negative determinants of QOL, followed by borderline, dependent, antisocial, and also self-defeating and narcissistic PDs, restricted to some specific sub-indexes of QOL. The study also showed that our results vary and are sometimes the opposite, depending on the sub-index of QOL examined. The study showed that it is necessary to apply a broad concept of QOL to disclose the real nature or the relationship between mental disorders and QOL. Furthermore, demographic variables, subjectively experienced somatic health, Axis I disorders, and PD traits appeared to be independently associated with QOL.     

What dot clusters and bar graphs reveal: subitizing is fast counting and subtraction

In two studies, we found that dot enumeration tasks resulted in shallow-sloped response time (RT) functions for displays of 1-4 dots and steep-sloped functions for displays of 5-8 dots, replicating results implicating subitizing and counting processes for low and high ranges of dots, respectively. Extracting number from a specific type of bar graph within the same numerical range produced a shallow-sloped but scallop-shaped RT function. Factor analysis confirmed two independent subranges for dots, but all bar graph values defined a unitary factor. Significantly, factor scores and asymmetries both showed correlations of bar graph recognition to dot subitizing but not to dot counting, strongly suggesting that subitizing was used in both enumeration of low numbers of dots and bar graph recognition. According to these results, subitizing appears to be a nonverbal process operating flexibly in either additive or subtractive fashion on analog quantities having spatial extent, a conclusion consistent with a fast-counting model of subitizing but not with other models of the subitizing process.     

Ministers’ Perceptions of Depression: A Model to Understand and Improve Care

While depression is a significant worldwide health problem, fewer than half of individuals seek care. Faith-based communities may play an important role in improving the knowledge of and linkage to depression care. Focus groups of Caucasian and African-American clergy were conducted to explore these issues. Using a grounded theory approach five themes emerged, including explanatory models of depression, barriers and facilitators to care, and recommendations for involving religious communities. A model of depression care pathways was constructed that integrates secular and spiritual approaches. The findings highlight the need for targeted interventions to build trust between clergy and mental health professionals. Teresa L. Kramer, Ph.D., is Chief Psychologist and Associate Professor of Psychiatry in the College of Medicine, University of Arkansas for Medical Sciences in Little Rock. She has conducted research in child, adolescent and adult mental health assessment, outcomes, and quality of care. Her current research on adolescent depression is funded through a Research Career Development Award from the National Institute of Mental Health. She is currently developing faith-based programs to educate ministers and their congregations about depression-related illness. Dean Blevins, Ph.D., teaches in the Department of Psychiatry, College of Medicine, at the university and is associated with the Center for Mental Health & Outcomes Research, Central Arkansas Veterans Healthcare System, and the South Central Mental Illness, Research, and Clinical Center in Little Rock. Terri L. Miller, Ph.D., also teaches in the Department of Psychiatry. Martha Phillips, Ph.D., is at the Department of Human Services in Little Rock. Vanessa Davis and Billy Burris are employed at the Division of Behavioral Health Services, also in Little Rock.     

E-mail, decisional styles, and rest breaks.

E-mail is a common but problematic work application. A scale was created to measure tendencies to use e-mail to take breaks (e-breaking); and self-esteem and decisional style (vigilance, procrastination, buck-passing, hypervigilance) were used to predict the self-reported and actual e-mail behaviors of 133 participants (students and marketing employees). Individuals who were low in defensive avoidance (buck-passing) engaged in more e-mailing per week, both in time spent on e-mail and message volume. E-breakers were more likely to engage in behavioral procrastination and spent more time on personal e-mail.     

Factors influencing self‐report of mobile phone use: the role of response prompt,time reference and mobile phone use in recall

The current study (n = 180) assesses factors affecting the recall of past mobile phone behaviour. It manipulates two factors hypothesised as influencing recall of duration and number of calls made: time reference (24 hours vs. 3 days) and context prompt (temporal, person called, reason for call) and also considers their impact in relation to levels of mobile phone use. A measure of recall error was constructed by matching self‐reported calls to actual calls and weighting for actual usage. The results indicate that most people tend to overestimate duration and underestimate number of phone calls, although these discrepancies are related to actual amount of mobile phone use. The manipulations of time reference and context prompt have some effect on the patterns of recall in relation to number, rather than duration, of calls. The implications of these results for the development of reliable and valid self‐report measures of mobile phone use are discussed. Copyright © 2008 John Wiley & Sons, Ltd.     

Effectiveness of school-based prevention and intervention programs for children and adolescents with emotional disturbance: A meta-analysis

The present study evaluated the effectiveness of school-based prevention and intervention programs for children and adolescents at-risk for and with emotional disturbance. Published outcome studies (k = 29) from December, 1988, to March, 2006, including 1405 children and adolescents were reviewed. Each investigation was coded on several variables describing the child, parent, and teacher samples, as well as reported outcome results. The overall mean weighted effect size was 1.00 at post-test and 1.35 at follow-up. Mean weighted ESs were 0.42 for between-subjects design studies, 0.87 for within-subjects design studies, and 1.87 for single-subject design studies. Prevention programs yielded a mean weighted ES of 0.54 and intervention programs produced a mean weighted ES of 1.35. Findings for specific outcome foci are presented and implications are discussed.     

Alcohol consumption and handwriting: A kinematic analysis

Cerebellar dysfunction is associated with deficits in the control of movement extent, as well as changes in the amplitude and relative amounts of acceleration and deceleration and action tremor. The present study sought to identify whether cerebellar symptoms occur in the handwriting of intoxicated individuals. Twenty participants in two sub-groups (alcohol dependent and non-alcohol dependent) were asked to write four cursive letter ‘l’s on a Wacom SD420 graphics tablet before and after consumption of a dose of vodka and orange producing a peak blood alcohol concentration of 0.048%. There was a relationship between blood alcohol concentration and stroke length. Kinematic analysis of handwriting indicated increases in the relative proportions of time spent in acceleration and increases in spectral power around 4 Hz. It was found that alcohol intoxication causes symptoms of cerebellar dysfunction, and that alcohol dependent individuals had less ballistic handwriting compared to non-alcohol dependent participants.     

Individual differences in trait urgency moderate the role of the affect heuristic in adolescent binge drinking

This study investigated the roles of the affect heuristic and outcome beliefs in explaining the relationship between negative urgency and adolescent binge drinking behaviour. The sample consisted of 391 Australian high school students, who were selected to be low or high on urgency. We hypothesised that highly urgent adolescents would be more likely than adolescents low in urgency to utilise the affect heuristic (i.e., to rely upon affective input) when making alcohol-related decisions. Multiple-group path analysis supported this prediction. Adolescents high in urgency exhibited greater use of the affect heuristic by displaying a direct path from affective associations to binge drinking; whereas adolescents low in urgency exhibited greater reliance upon rational processing by displaying an indirect path via outcome beliefs.