The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Speed and accuracy of positioning weightless objects as a function of mass, distance and direction

Report Number: WADD TR 61-182
Author: Kama, W. N.
Corporate Author: Aerospace Medical Research Laboratory
Laboratory: Wright Air Development Division
Date of Publication: 1961-03
Pages: 26
AD Number: AD0260131

Human performance in positioning weightless objects was investigated experimentally using an air-bearing frictionless table. The subjects moved each four masses (1000, 3000, 5000, and 7000 gra ) various distances (10,20, and 40 cm) in each of two directions over this frictionless table in response to paired light stimuli. The responses were accomplished in complete darkness after the lights were extinguished. Results were analyzed in terms of constant and absolute errors of positioning, and response time. From the investigation, we concluded that: (1) Mass has little effect on the accuracy of positioning. There i some evidence, however, that response time increases with increase in mass. (2) Distance is a significant variable affecting the direction of error, accuracy, and speed of positioning responses. Response time increases, and accuracy decreases with distance. (3) Direction of movement is a significant variable affecting constant error, absol to error, and speed of positioning responses. Subjects tend to undershoot the mark in near to far movements.

Contrails does not possess a copy of this report. Click here to offer Contrails a donation of this report

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
The inside cover of this report indicates that it was released for public sale