Effects of Miniature CRT (Cathode Ray Tube) Location upon Primary and Secondary Task Performances
Abstract
Dual task performances were investigated as a function of the location of a peripherally-mounted miniature CRT which presented secondary task information. The miniature CRT's location was varied across three levels of elevation and four levels of azimuth. Primary task information was presented by means of a stationary, centrally-located CRT. The primary task required continuous monitoring of the primary display, while the secondary task required continuous tracking of an object on the secondary display. In general, the results indicated that performance decrements were not only a function of the absolute size of the viewing angle formed by the primary and secondary displays, but, in addition, by its direction. For example, 1) primary task performance decrements were generally greater when upward eye shifts were required to view the secondary display than when the corresponding downward eye shifts were required; 2) secondary task performance decrements were obtained only with upward eye shifts; and 3) lateral eye shifts produced smaller primary task decrements than comparable upward eye shifts.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1989
- Accession Number
- ADA210223
Entities
People
- Donald L. Monk
- Evan P. Rolek
- Ronald M. Katsuyama
- Suzanne Johnson