Accession Number : AD0757648

Title :   Forehead Surface EMG During Mental Multiplication.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA CREW SYSTEMS DEPT

Personal Author(s) : Bromberger,Richard A.

Report Date : 30 OCT 1972

Pagination or Media Count : 23

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)

Descriptors :   (*ELECTROMYOGRAPHY, *PSYCHOLOGY), SKIN(ANATOMY), SURFACES, PERFORMANCE(HUMAN), MUSCLES, PHYSIOLOGY, PSYCHOPHYSIOLOGY

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE