Accession Number : AD0432707


Title :   THE EFFECTS OF CURVILINEAR AND DISCRETE TRANSFORMATIONS OF ERROR INFORMATION ON HUMAN TRACKING PERFORMANCE,


Corporate Author : DAYTON UNIV OHIO


Personal Author(s) : Hunt,Darwin P


Report Date : Dec 1963


Pagination or Media Count : 13


Abstract : The effects of discrete nonlinear transformations of tracking error information on the accuracy and efficiency with which the human operator can perform a compensatory tracking task were studied. Nine groups of seven subjects each were given forty 1-min. trials under nine different informational display conditions. The nine informational conditions were obtained by combining three levels of information quantization (3, 7, or 11 categories of information) with three types of overall relationships between the displayed error and the actual error (linear, nonlinear magnification, or nonlinear minification). Indices of tracking accuracy and tracking efficiency were obtained by integrating absolute values of the voltage analogs of the actual tracking error and of the control stick deflections, respectively. Greater tracking accuracy was associated with (1) a linear relationship between displayed error and actual error, (2) a larger number of informational categories and (3) practice. Generally, tracking accuracy improved in a negatively accelerated fashion as the number of informational display categories increased. Tracking efficiency generally increased with practice. Also, practice exhibited a differential influence on tracking efficiency depending upon the number of informational display categories. (Author)


Descriptors :   *HUMAN FACTORS ENGINEERING , *LINEAR SYSTEMS , TRACKING , PERFORMANCE(HUMAN) , ERRORS , TRANSFORMATIONS , DISPLAY SYSTEMS , CONTROL STICKS , CODING , CONTROL , ANALYSIS OF VARIANCE , JOB ANALYSIS , NONLINEAR SYSTEMS


Distribution Statement : APPROVED FOR PUBLIC RELEASE