Selecting from dynamic environments: attention distinguishes between blinking and moving

Pinto, Olivers, and Theeuwes (2006) showed that a static target can be efficiently found among different types of dynamically changing distractors. They hypothesized that attention employs a broad division between static and dynamic information, a hypothesis that conforms with earlier research. In the present study, we investigated whether attention can only make use of this crude division or can exploit more subtle discriminations within the dynamic domain. In Experiment 1, participants were able to efficiently find a blinking target among moving distractors and moving targets among blinking distractors, although all items changed at the same rate and produced the same change in local luminance. In Experiment 2, search for a dynamic target among dynamic distractors was aided when we gave the distractors additional dynamic cues. Experiment 3 showed that making the displays equiluminant affected search efficiency for a static target among moving distractors, but not among blinking distractors. The findings refute the broad division hypothesis and suggest that object continuity plays an important role in selection.     

Films for eliciting emotional states in children

Standardized sets of films have been shown to be effective for eliciting emotional states in adults, but no comparable validated stimuli are available for children. We therefore examined the effects of three pre-selected film clips each of 3-min duration in eliciting a pleasant, neutral and unpleasant emotional state in 297 children aged between 6 and 12 years. After the films were presented on a video projector, affective ratings were obtained with the Self-Assessment-Manikin on the emotional dimensions of valence and arousal. Increasing pleasure ratings were observed from the unpleasant to the neutral to the pleasant film. Associated arousal ratings were stronger for the unpleasant and pleasant films compared to the neutral film. Overall, results showed successful elicitation of targeted emotional states only marginally influenced by age, gender or prior experience with the films. The use of these films is therefore suggested for future studies on emotions in children.     

Are people changed by the experience of having an episode of depression? A further test of the scar hypothesis

The purpose of this study was to identify characteristics of individuals before and after their first depressive episode. Subjects were 49 older persons assessed before and after their first depressive episode on depression-related psychosocial variables. The control group consisted of 351 never-depressed individuals. Consistent with previous findings, patients were more likely to be younger, female, and mildly depressed both before and after the episode. In addition, they were more likely to be employed. Following an episode of depression, the recovered patients described their social skills and health as poorer and their interpersonal dependency as greater than the controls. However, on an experiment-wise basis, the number of significant differences were no greater than expected by chance. The stress activation model was examined but did not appreciably enhance the results. Results suggest that most of the psychosocial variables associated with depression are state dependent.     

Dimensionality of coping and its relation to depression

The dimensionality of coping, as measured by 65 items from 3 commonly used instruments, and the relation of coping and stress to concurrent and future depression were studied in a community sample of 742 older (greater than or equal to 50 years old) adults. Measures of coping, stress, and depression were obtained at 2 time points over a 2-year period. Depression was assessed by symptom checklist and by diagnostic interview. Three coping factors--Cognitive Self-Control, Ineffective Escapism, and Solace Seeking--that had adequate psychometric properties and accounted for 25% of the total item variance were identified. Ineffective Escapism was associated with current depression and had a direct and interactive effect on future depression, exacerbating the negative impact of stress rather than acting as a buffer. Although Cognitive Self-Control was unrelated to either concurrent or future depression, Solace Seeking significantly buffered the effect of stress in predicting a future diagnosis of depression. Stress and initial depression level predicted both measures of future depression. Gender (being female) predicted the future diagnosis of depression but not the increase of depressive symptoms.     

The Life Attitudes Schedule-Short Form: psychometric properties and correlates of adolescent suicide proneness

The goals of the present study were to describe the psychometric properties of the Life Attitudes Schedule-Short Form (LAS-SF) in adolescents and provide criterion and construct validity data, including bivariate and multivariate associations with related risk behaviors. Anonymous questionnaires containing the LAS-SF and related measures were administered to 1,742 high school students in three states. Psychometric properties for LAS-SF items and total score were very good, and the LAS-SF was correlated with almost all of the examined risk behaviors, illustrating the broad range of problems measured by the instrument. LAS-SF total scores were associated with past suicide attempt, even after controlling for the impact of current depression. Clinical and research uses for the LAS-SF are discussed.     

Comparability of self-report checklist and interview data in the assessment of stressful life events in young adults

The purpose of this study was to evaluate the incremental value of conducting an interview to assess stressful life events over the self-report questionnaire approach, first by examining the degree to which life events reported on a questionnaire met inclusion criteria in a detailed stress interview, and second, by comparing the magnitude of prospective associations with depression symptoms for the two different assessment procedures. Data from the Oregon Adolescent Depression Project were examined, in which 191 community-residing young adults (55% female; M age=23.6, SD=0.6) completed a mailed questionnaire assessing the frequency with which 33 life events had occurred to them or to other important people in their lives prior to the diagnostic and stress interviews. An average of 67.5% of events occurring to self met criteria for classification as a life event on the stress interview, as did 19.7% of the events occurring to others. Events having a large effect on the participant had a greater likelihood of meeting inclusion criteria on the stress interview. Contrary to expectation, stress scores from the interview assessment did not result in stronger associations with depression. Recommendations for assessment of stressful life events are offered.     

Mental fatigue influence on effort-related cardiovascular response: difficulty effects and extension across cognitive performance domains

Two experiments investigated cardiovascular effects of mental fatigue as a function of (1) the difficulty of the cognitive challenge with which participants were confronted, and (2) the relevance of that challenge to the activity that instigated the fatigue. In the first, participants performed an easy (fatigue low) or difficult (fatigue high) counting task and then were presented an arithmetic challenge (task B relevance high) or a scanning challenge (task B relevance low) with instructions that they would avoid a noise if they attained a modest performance standard. Analysis of blood pressure responses assessed during the work periods revealed fatigue main effects, reflecting stronger responses for High Fatigue participants, regardless of the character of the second task. In the second, the procedure was the same except that it included a high performance standard and provided the chance to win a prize. Analysis of the pressure data revealed fatigue x work period interactions, reflecting relatively stronger responses among High Fatigue participants in work period 1, but relatively weaker responses among these participants in work period 2. Results confirm previous findings and support an analysis of fatigue influence on effort and associated cardiovascular responses. They also argue against the idea that mental fatigue influence may be confined to relevant cognitive performance realms.

Testing the Model of Influence of Presumed Influence in a Boundary Condition: The Impact of Question Order

We argue that evidence for and utility of the Influence of Presumed Influence (IPI) model lies in a robust causal chain in the form of self‐exposure → other‐exposure → perceived effects on others → behavior. A review of extant literature reveals competing theoretical explanations, as well as the possibility that a method factor (question order) could have driven the obtained models in structural equation modeling (SEM) analyses. The IPI model was tested in the boundary condition of different question orders using data from a web‐based experimental study. The results from 2‐group model SEM analyses show that the causal directions among presumed influence and media effects schema variables are indeed a function of question order.     

Antecedents of Business Opportunity Identification and Innovation: Investigating the Interplay of Information Processing and Information Acquisition

Building on conceptual frameworks of entrepreneurial discovery, we argue that active information search compensates for a lack of entrepreneurial experience and enhances the effects of divergent thinking and general mental ability (GMA) on opportunity identification. We sampled 100 business owners in South Africa. Results confirmed the hypothesised moderating effects of active information search on the relationships of entrepreneurial experience and divergent thinking on opportunity identification. Furthermore, we found direct effects of opportunity identification and conditional indirect effects of divergent thinking on innovativeness of product/service innovations. Our findings suggest that a joint examination of entrepreneurial experience and divergent thinking with active information search helps to better understand opportunity identification.