PubMed Health⌕ Search

Biomedical subjects

R E Connally

Publications and source records attributed to R E Connally.

4 recordsLinked to original sources
PubMed1986

Task performance and electromyopotential as functions of task difficulty and EMG feedback.

The dearth of empirical research in the application of biofeedback is discussed. Exp. 1 assessed relationships among biofeedback EMG training, EMG levels, cognitive task performance, and task difficulty. 72 subjects (male or female college students) were administered 1 trial on an iconic memory task with either EMG audio feedback, sham EMG audio feedback, or no feedback. Three levels of task difficulty were used. One 20-min. training session significantly lowered EMG responses, and task performance was inversely related to task difficulty. No relationship between EMG level and task performance was observed. Exp. 2 investigated the effect of increased EMG responses on cognitive task performance for one level of difficulty. One biofeedback training session did not significantly increase frontalis EMG, and there was no relationship between increased EMG and task performance.

Adult↗
PubMed1983

Three recurring electromyographic biofeedback research problems and a laboratory model.

Exp. I investigated three recurring problems in electromyographic (EMG) biofeedback research. (1) Pre-knowledge that research involved biofeedback resulted in a selective bias on the part of students asked to volunteer as subjects. (2) EMG readings were not affected by repeated use of the word relax in verbal instructions. (3) The forearm extensor was the only muscle group which showed a statistically significant effect after one 20-min. training session. Exp. II challenged and clarified results of Exp. I and concluded the study with an empirically derived laboratory model for EMG biofeedback research.

Adolescent↗