Estimating the validity of the guilty knowledge test from simulated experiments: the external validity of mock crime studies

This experiment was designed to examine the external validity of the standard mock-crime procedure used extensively to evaluate the validity of polygraph tests. The authors manipulated the type of mock-crime procedure (standard vs. a more realistic version) and the time of test (immediate vs. delayed) and examined their effects on the validity of the Guilty Knowledge Test (GKT) and the recall rate of the relevant items. The results indicated that only the type of mock-crime affected the 2 outcome variables. The realistic procedure was associated with a lower recall rate and weaker detection efficiency than the standard procedure. However, these effects were mediated by the type of GKT questions used. Practical implications of these results are discussed.     

Effects of Movement Improvisation and Aerobic Dancing on Motor Creativity and Divergent Thinking

Creativity is considered to be an embodied concept, where internal psychological and external behavioral processes are intertwined. Creativity enhancement programs often target the cognitive side of this bi‐dimensionality leaving the impact of motor interventions underexplored. To address this gap in the literature, we tested the effectiveness of two motor programs on motor creativity and divergent thinking (verbal and figural). A total of 92 college students (M_age = 25.36, SD = 2.66) were randomly allocated to a movement improvisation, an aerobic dance, or a control condition. Participants in both motor programs took part in ten 30‐minute classes twice a week over a period of 5 weeks. The findings revealed a significant effect of the motor programs on motor fluency and flexibility. Movement improvisation yielded the greatest effects on those variables, followed by aerobic dancing and control condition. Movement improvisation also impacted significantly more figural originality than the control condition. However, the effects were limited to the motor domain and failed to transfer into other divergent thinking variables. The findings highlighted the contribution of movement programs to creative potential development, and the imperative role of a non‐judgmental environment, where individuals are free to move spontaneously.     

Reliability and validity of a DSM-IV based ADHD screener.

The Diagnostic Rating Scale (DRS) was completed by the parents and teachers of 82 children referred for clinical evaluations, 73 referred children seen twice, and 218 non-referred children from the community. The DRS, which uses a categorical rather than a dimensional rating approach, was 70% to 90% sensitive to diagnoses of Attention Deficit/Hyperactivity Disorder (ADHD) made by blind clinical teams. In research and clinical applications, the DRS could improve screening efficiency, especially in situations where it would be desirable to exclude all children who might have ADHD or identify all children with Hyperactive-Impulsive symptoms. Because of its objectivity and consistency with the Diagnostic and Statistical Manual (DSM)-IV criteria, the DRS could facilitate comparison of participant samples across studies.     

Nonlinear model of attention focus during accumulated effort

ObjectivesThe emergent nature and dynamics of Task-Related Thoughts (TRT) during accumulated physical effort was used to test a model of attention focus based on the application of nonlinear dynamic systems theory (NDST).DesignA one-group two-trials quasi experimental design was employed.MethodsEleven physically active participants ran twice on a treadmill at an intensity of 80% of their HR_max until voluntary exhaustion. During the first run their intrinsic dynamics of attention focus was established. Accordingly, during the second run they were asked to intentionally maintain Task-Unrelated Thoughts (TUT), and reporting back about spontaneous switches from TUT to TRT, and vice versa.ResultsResults revealed that the intentionally imposed TUT was stable at the beginning of the test, switched spontaneously to TRT with accumulated effort, competing with TUT and showing metastability, until a final TRT state prevails.ConclusionsThe observed phenomena points to a nonlinear dynamic self-regulation of attention focus during accumulated effort.     

Fluctuating dynamics of perceived exertion in constant-power exercise

ObjectivesTo reveal and study the fluctuating dynamics of perceived exertion (PE) during constant-power exercise performed under different conditions (duration, intensity, and termination).DesignA pilot and two subsequent experimental studies were performed. The studies consisted of manipulating workload and measuring fluctuating perceived exertion dynamics throughout the cycling task.MethodsIn a pilot study Borg's rating of perceived exertion (RPE) was measured every 15 s in 2 groups of 9 participants each (using RPE 6-20 and CR10 scales, respectively) cycling at heavy intensity until volitional exhaustion. The percentage of participants alternating increased and decreased RPE values (fluctuating dynamics) was calculated. In 2 subsequent experiments PE changes (increase/decrease perceptions) were reported when occurring in 2 groups of 13 participants cycling at a moderate intensity for 30 and 60 min, respectively (Experiment 1), and in another group of 12 participants cycling at heavy intensity until volitional exhaustion (Experiment 2). The individual time series of “increase”/“decrease” reports were divided into 5 non-overlapping temporal windows, and the percentages of “PE increase” were calculated for each window.ResultsIn the pilot study 66.6% (RPE 6-20 group) and 33.3% (CR10 group) of the participants showed an RPE fluctuating dynamics during the exercise. However, all participants showed a clear PE fluctuating dynamics during the moderate and heavy intensity exercises performed in Experiment 1 and Experiment 2, respectively. Nevertheless, a transition towards a PE non-fluctuating dynamics (dominated by “PE increase” reports) was noticed in Experiment 2 while approaching volitional exhaustion.ConclusionsPE seems to have a dominant fluctuating dynamics during constant-power cycling performed under different conditions (duration, intensity, and termination) that changes towards a non-fluctuating dynamics when approaching the volitional exhaustion point.     

Functional Mental Representation of Volleyball Routines in German Youth Female National Players

The purpose of this study was to examine the overhand volleyball service routines of the German Youth Female National Team. Mental representations of this movement were reconstructed using the Structure Dimensional Analysis-Motoric method. The Routine Questionnaire was administered to collect self-report data. Results indicated that the mental representations of routines are organized in a hierarchical, tree-like structure. The movement mental representations of players not selected to the national team were organized in a less hierarchical manner. The coach's performance ranking was significantly correlated to the athlete's mental representation invariance values (structure quality), indicating a close relationship between mental representation and performance.     

Benefits Derived by College Students from Mentoring At-Risk Youth in a Service-Learning Course

Service learning is increasingly being used as a pedagogical strategy for promoting the development of civic-mindedness among university students. Despite the use of this strategy, little is known about the benefits derived from specific types of service-learning experiences. Additionally, few notable studies have examined the unique outcomes experienced by mentors of at-risk youth. Therefore, this study examines the civic-related benefits that college students derive from mentoring at-risk youth within a structured, service-learning course. A series of linear regression models were estimated to determine if there were significant post-intervention differences between the treatment and comparison condition for the variables of interest, after adjusting for key background factors and pre-intervention levels of all variables. The results indicated that, in comparison to college students who did not participate in the course (n = 258), college student in Campus Corps, a youth mentoring program, (n = 390) had significantly higher scores at post-intervention regarding mentors’ civic attitudes, community service self-efficacy, self-esteem, interpersonal and problem solving skills, political awareness, and civic action. Findings hold important implications for youth mentoring programs and future research.     

R. ARELEH ROTH'S PRISTINE FAITH

Areleh Roth responded to the Holocaust by labouring to have Jews actualize pristine faith. As the slaughter in Europe mended the sinful universe prior to the advent of the Messiah, the living were enjoined to bring to bear the faith which was experienced by Abraham and which the people of Israel inherited over the ages. This meant struggling against the forces of Amalek who clouded the perception of God's presence amid the tragedy. Under divine aegis, Amalek brought suffering to induce repentance, he tested the people in order to activate free will, and clouded the perception of God's presence amid catastrophe. The struggle centred on annulling one's personality entirely, enabling God to enter the heart so completely as to totally replace the ego. This was the experience of pristine faith, and with it one related to God, through Abraham, and gained the strength to endure the tragedy. Even more, one's soul could join the ascent of those sparks which were dispersed upon the cosmic catastrophe (described by Isaac Luria) and thereby contribute to, and participate in, the rise of Israel to the spiritual redemption of the Sabbath before Adam's sin. Roth's response to the catastrophe was not of theological exposition (for example, why the pious suffered) but of practical means to survive and thrive on the level of spirit.     

Primacy Effect in Credibility Judgements: The Vulnerability of Verbal Cues to Biased Interpretations

We explored the vulnerability of credibility judgements of written accounts (mediated by their richness in details) to primacy effect. Specifically, we examined whether the order by which two texts were presented affected their credibility judgements. In Experiment 1, participants read two life stories of the same narrator, one rich and the other poor in details, while their presentation order was manipulated. Results showed that participants tended to believe the narrator more when the rich story preceded the poor story than when the presentation order was reversed. In Experiment 2, the richness‐order was manipulated within a single story, and its results revealed that, although participants read stories of equal length, they perceived a story that began in a rich manner as richer than a story that began in a poor manner. Together, results point to the vulnerability of the ‘richness in detail’ indicator to judgemental biases. Copyright © 2013 John Wiley & Sons, Ltd.