MUSCULAR AND CIRCULATORY RESPONSES: THEIR SENSITIVITY ASSESSED IN A SIGNAL DETECTION SITUATION.
Abstract
In this first attempt to employ signal detection methodology in the assessment of the absolute sensitivity of somatic response systems, four muscular and four circulatory variables wer studied: EMG potentials from the forearms, neck, and jaw; amplitude of R-wave in EKG, heart cycle time, digital volume pulse, and finger volume. The somatic responses were recorded continuously while four subjects engaged in a typical auditory detection task. The somatic activity was assessed both before and after each observation interval. Readings of the integrated EMG potentials were obtained for each of four seconds, while the circulatory variables were measured on each of 15 heart beats. Two basic analyses were performed within each variable: (a) the activity on Signal and Noise trials was compared in order to establish whether, and at what time, systematic 'signal effects' occurred; (b) the difference in activity on S and N trials under one signal energy was compared to the difference under the other to locate possible 'energy effects'. Both analyses were performed within the individual data as well as in the total data for all subjects. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1966
- Accession Number
- AD0634784
Entities
People
- Kolbjorn B. Kviem
Organizations
- Indiana University Bloomington