Effects of event rate and display time on sustained attention in hyperactive,normal, and control children

Two experiments were conducted to determine whether hyperactive boys have a unique deficit in sustained attention. Groups with DSM-III diagnoses of attention deficit disorder (ADDH), conduct disorder (CD), ADDH+CD, and learning disorder were compared with normal controls on the Continuous Performance Task. In Experiment 1, stimulus presentation rate (stimulus onset asynchrony, SOA) and display time were varied to manipulate attentional demand, and speed and accuracy of performance were measured. The ADDH group was uniquely affected, with less accurate performance at the fastest and slowest SOA. To distinguish the effects of time on task and SOA, the duration of each SOA condition was held constant in Experiment 2. The poorer performance of the ADDH group at the fastest SOA was no longer evident. This finding indicates that the deficit of sustained attention in boys who have ADDH is associated with a greater susceptibility to refractory effects, which is influenced by practice.This research was supported by the Ontario Mental Health and Ruth Schwartz Foundations through a graduate fellowship awarded to P. Chee and a research grant to R. Schachar, G. Logan, and R. Wachsmuth. Dr. Schachar was also supported by the Canadian Psychiatric Research Foundation. This article is based, in part, on a doctoral dissertation submitted by the first author to the Ontario Institute for Studies in Education. The authors thank Dr. John Lovering and the staff of the Departments of Psychiatry and Psychology, The Hospital for Sick Children, for their cooperation in the conduct of this study. This paper was prepared with the assistance of the Medical Publications Department, The Hospital for Sick Children, Toronto.     

Future Professionals and Managers: Their Attitudes Toward Unions, Organizational Beliefs, and Work Ethic

The authors replicate and extend the research on future workers' union attitudes, organizational beliefs, and work ethic. Selected demographic and attitudinal data were collected from a sample of 644 students at a small, western Pennsylvania university. Compared to earlier research on pre-employment predictors of union attitudes, this study is based on a much larger sample size and includes a cross-section of majors. The results offer additional support for the family socialization process; in general, future professionals and business managers are more sympathetic to labor unions if they were children of union members. In addition, the results show that student major has a significant and systematic impact on both positive and negative union attitudes.     

Relationships between the Dark Triad and humor styles: A replication and extension

Two hundred undergraduate students completed paper-and-pencil measures of the Dark Triad (Machiavellianism, narcissism, and psychopathy) and the Humor Styles Questionnaire, which taps two adaptive (affiliative and self-enhancing) and two maladaptive (aggressive and self-defeating) styles of humor. The first purpose of the study was to replicate relationships between these variables reported by Veselka et al. (2010). The second purpose was to expand on their results by investigating relationships between several sub-factors of the Dark Triad (in addition to global scores) and the humor styles. Results provided substantial replication of Veselka et al. at the global level and, at the sub-factor level, provided additional insights into the potential role of adaptive and maladaptive humor styles in the personality dynamics of individuals characterized by the various facets of the Dark Triad.     

Changes in materialism,changes in psychological well-being: Evidence from three longitudinal studies and an intervention experiment

Few studies have examined how changes in materialism relate to changes in well-being; fewer have experimentally manipulated materialism to change well-being. Studies 1, 2, and 3 examined how changes in materialistic aspirations related to changes in well-being, using varying time frames (12 years, 2 years, and 6 months), samples (US young adults and Icelandic adults), and measures of materialism and well-being. Across all three studies, results supported the hypothesis that people’s well-being improves as they place relatively less importance on materialistic goals and values, whereas orienting toward materialistic goals relatively more is associated with decreases in well-being over time. Study 2 additionally demonstrated that this association was mediated by changes in psychological need satisfaction. A fourth, experimental study showed that highly materialistic US adolescents who received an intervention that decreased materialism also experienced increases in self-esteem over the next several months, relative to a control group. Thus, well-being changes as people change their relative focus on materialistic goals.     

Eye Metrics: An Alternative Vigilance Detector for Military Operators

Military operators in various environments such as cyber, remotely piloted aircraft, and image analysis are required to use sustained attention or vigilance for long periods. During this time they encounter lapses in attention attributable to the monotonous nature of their tasks. Mistakes during these tasks can have serious consequences. The purpose of this study was to investigate the use of an eye-tracker to detect changes in vigilance performance during a simulated cyber operator task. Twenty participants performed 4 sessions of a 40-min vigilance task while wearing an eye-tracker. Blink frequency, blink duration, PERCLOS (percentage of eye closure), pupil diameter, pupil eccentricity, pupil velocity, and signal detection all had a significant change over time (p < .05) during the task. The significant change of oculometric measurements indicates oculometrics could be used to detect changes in vigilance for military operators. Future research is needed to assess real-time effects of these oculometrics on performance, especially in a real-world setting.