Skill performance on biorhythm theory's physically critical day.

The hypothesis of a critical day in biorhythm theory predicts that skill performance would be lower than normal on a physically critical day. Participants in an archery league were observed in 346 events. Indoor archery performance provided scores identical to the goal of the task and unaffected by environmental conditions or other competitors. Above-average performances on 34 physically critical days did not differ significantly from the population proportion of above-average performances. No support for the hypothesis was provided by this observation of archery performance.     

Relative Effects of Three Knowledge of Results Treatments on Coincidence-Anticipation Performance

The relative effects of three knowledge of results (KR) treatments on performance of a complex coincidence-anticipation task requiring speed and accuracy were studied. Male volunteers (n=75) were assigned to one of three treatments: no KR, quantitative KR, or qualitative KR. No significant differences in the performance of treatment groups were found. It was suggested that the task itself may have provided enough information for fairly accurate performance.     

Sequential grouping of pure-tone percepts evoked by the segregation of components from a complex tone

A sudden change applied to a single component can cause its segregation from an ongoing complex tone as a pure-tone-like percept. Three experiments examined whether such pure-tone-like percepts are organized into streams by extending the research of Bregman and Rudnicky (1975). Those authors found that listeners struggled to identify the presentation order of 2 pure-tone targets of different frequency when they were flanked by 2 lower frequency "distractors." Adding a series of matched-frequency "captor" tones, however, improved performance by pulling the distractors into a separate stream from the targets. In the current study, sequences of discrete pure tones were substituted by sequences of brief changes applied to an otherwise constant 1.2-s complex tone. Pure-tone-like percepts were evoked by applying 6-dB increments to individual components of a complex comprising harmonics 1-7 of 300 Hz (Experiment 1) or 0.5-ms changes in interaural time difference to individual components of a log-spaced complex (range 160-905 Hz; Experiment 2). Results were consistent with the earlier study, providing clear evidence that pure-tone-like percepts are organized into streams. Experiment 3 adapted Experiment 1 by presenting a global amplitude increment either synchronous with, or just after, the last captor prior to the 1st distractor. In the former case, for which there was no pure-tone-like percept corresponding to that captor, the captor sequence did not aid performance to the same extent as previously. It is concluded that this change to the captor-tone stream partially resets the stream-formation process, and so the distractors and targets became likely to integrate once more.     

Sensitivity of MMPI Validity Scales to Motivational Factors in Psychological Evaluations of Police Officers

To examine whether Minnesota Multiphasic Personality Inventory (MMPI) validity scales are sensitive to motivational sets in a specific forensic population, we compared three groups of 20 police officers being evaluated for fitness to return to duty: those who expressed a desire to return; those desiring not to, and a control group. Results indicate that four validity indices Significantly differentiated experimental groups in the expected directions. Officers wanting to return to duty minimized psychological difficulties significantly more than the other groups. Thus, our study supports the usefulness of MMPI validity scales in assessing response bias in police fitness evaluations. Data suggest that minimization occurs primarily for obvious emotional or characterological problems.     

Eye movements during coincidence-anticipation performance

The present study related visual processing, as indicated by eye movements, to performance accuracy on coincidence-anticipation tasks. Three age groups were tested on a coincidence-anticipation task and their eye movements recorded. Three levels of response were administered under three levels of stimulus speed. A MANOVA indicated that both eye tracking and coincidence-anticipation varied among the age groups and with stimulus speed, although in different directions. Eye tracking error decreased with increasing age but only the coincidence-anticipation response accuracy of the youngest group appeared to be less accurate than that of the adults. Eye tracking error also decreased with decreasing stimulus speed but coincidence-anticipation performance was least accurate at the slow speed. Coincidence-anticipation error was the major contributor to performance differences with changes in the type of response.     

Rethinking leadership education: narrative inquiry and leadership stories

This narrative essay shares observations and insights about how instructors can use creativity, student voice, and personalized learning to create more responsive educational leadership pedagogy. Three stories, as told by a professor and two former students, explore how students’ narratives can naturally inform educational leadership preparation across international borders. We aim to demonstrate how students’ narrative experiences in education can contribute to exisiting discourse and research on effective and innovative pedagogical practice in educational leadership preparation.