Biomedical subjects

Bill Kozar

Publications and source records attributed to Bill Kozar.

2 recordsLinked to original sources

PubMed2005

Comparing performance by parents and offspring on a rapid tapping task.

The purpose of this study was to identify the relationships between 42 parents' and their offsprings' performance on a rapid tapping task. It was expected that genetic predispositions would gradually limit children's performance on a tapping task as they matured chronologically. Four different age groups of children and their parents performed the tapping task on different sizes of boards. Repeated-measures analysis of variance indicated that, while parents' mean performance was generally higher than that of their children (F = 32.89, p < .001), the difference was affected by the children's age, which hand was used, and the board size. Spearman rank correlation scores between parents' and children's overall performances gradually increased across age groups (p = -.29, -.10, .47, and .40, respectively, from younger to older age groups). This finding suggests that the potential of youngsters' future performance may be predicted with greater certainty by observing their parents' present performance. This may improve the predictive power of planned programs.

Adolescent↗

PubMed2002

Velocity, occlusion, and sex of subjects in coincidence of anticipation.

The purpose of this study was to assess effects of velocity, occlusion distance, and sex on coincidence of anticipation. The Bassin anticipation timer was used to test 25 men and 25 women when velocity was .69 m/sec. and 1.38 m/sec. or "slow" and "fast", and occlusion distances of zero, 1.06 m and 2.12 m were "zero," "small," and "large" on a 4.25-m length of track. There were six test conditions. Analysis showed that increased occlusion distances produced increased absolute, constant, and variable error scores. A significant interaction of velocity and occlusion appeared for all error measures. With an increase in occlusion distance at the slow velocity constant error increased in the positive direction or early response while at the fast velocity a similar increase in constant errors was seen but in the negative direction or late response. Under zero occlusion the expectation that performance at the fast velocity would be more accurate and show less variability than at the slow velocity was not supported. Also, sex did not significantly affect anticipation time in any condition or on any error measures.

Acceleration↗