Forehead Surface EMG During Mental Multiplication.
Abstract
The electrical activity of striated muscle, measured at the surface of the skin (surface electromyography or EMG), has been suggested as a correlate of the organism's psychological state. In this experiment forehead EMG was recorded while subjects (Ss) mentally solved multiplication problems varying in difficulty. Difficulty was defined in terms of: (a) time to solve the problem and (b) the percentage of Ss solving the problem correctly. For four Ss the two measures of difficulty were found to correlate. Although forehead EMG was significantly higher during periods when S was instructed to solve a problem than during periods when he was not, no significant relationship between EMG and either measure of task difficulty was found. Additionally, the data did not support the frequently reported progressive increase in EMG from the beginning to the end of a psychological task. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 1972
- Accession Number
- AD0757648
Entities
People
- Richard A. Bromberger
Organizations
- Naval Air Warfare Center Warminster