Accession Number : ADP001633

Title :   Keyboard Design Variables in Dual-Task Mode Selection,


Personal Author(s) : Hansen,Mark D.

Report Date : JAN 1983

Pagination or Media Count : 7

Abstract : Research was performed to determine the optimal and desirable qualities of a keyboard interfaced with a remote display. The keyboards were two 3 x 3 keyboards, one with buttons 5.16 mm in diameter and the other 12.7 mm square. The experimental task involved subjects centering a set of crosshairs on a cursor on a CRT (with their right hand), while simultaneously selecting modes (with their left hand) on the keyboards without observing the keyboards. The experimental design was as follows: (1) two keyboards; (2) three orientations of the keyboard (0, 15 and 35 deg) from the horizontal and (3) with and without gloves (approved Air Force flight gloves). This design was conducted as a 3 x 2 x 2 repeated measures factorial design. Performance measures were response time on the keyboards, selection errors on the keyboard and tracking scores. Study results indicate that mean response time was significantly lower on the large keyboard when examining both keyboards as a whole and with and without gloves. However, error rate was not found to be a significant factor across conditions. In addition, tracking scores were found to be significant -- the tracking only versus the combined task condition. No specific angle was found to be significant, but pilots had a preference for the 15 deg (75%) over the other two keyboards. Thus the results indicate the use of the enlarged keyboard in the 15 deg orientation when using gloves.

Descriptors :   *Keyboards, Cathode ray tube screens, Manual operation, Tracking, Factor analysis, Performance tests, Pilots, Flight clothing, Gloves, Reaction time, Control panels, Multiple operation

Distribution Statement : APPROVED FOR PUBLIC RELEASE