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Biomedical subjects

D Bowers

Publications and source records attributed to D Bowers.

At least 91 records · Page 5Linked to original sources
PubMed1978

Simultaneous performance on verbal, nonverbal and motor tasks by right-handed adults.

A series of four dual task experiments was conducted in which different groups of right-handed Ss (N1 = 24; N2 = N3 = N4 = 18) simultaneously performed a repetitive finger tapping task in conjunction with: (a) a verbal fluency task (Experiment I); (b) listening to logical memory stories from the Weschler Memory Scale (Experiment II); (c) reading logical memory stories (Experiment III); and (d) scanning an array of faces (Experiment IV). Results indicated that all three verbal tasks produced significant asymmetrical depression in tapping performance, with the right hand being more disrupted then the left. The visuo-spatial task, however, exerted symmetrical bilateral depression of both hands. Performance on the cognitive tasks (number of words produced in the verbal fluency task; recall of stories either listened to or read, recognition of faces) was unaffected by simultaneous digital tapping.

Adult↗
PubMed1977

Within-modal and cross-modal reliabilities of two laterality tests among left handers.

20 left handers were administered four repeat testing of a dichotic listening task and a verbal visual half-field task. Scores on the dichotic task were reliable between Days 1 and 4 while visual half-field performance did not stabilize until two testing sessions. Left handers showed a clear right channel, superiority of the right visual half field for the verbal material. No significant cross-model reliabilities were observed. It was also found that, in comparison to right handers, left handers show more variability in channel/visual half field than right handers on the same procedures.

Auditory Perception↗
PubMed1976

Reaction times in Parkinson disease.

Ten hypokinetic parkinsonian patients and ten age- and sex-matched controls were tested, using reaction times with and without a warning signal. The time difference between each was used as a measure of phasic arousal. Both groups' reaction times improved with a warning signal, but there were no differences in reaction-time reduction between the parkinsonian and control groups. These results suggest either that hypokinesia in parkinsonism is not caused by an arousal defect or it is caused by a defect in the "autoevoked" arousal system.

Arousal↗