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

Item

Title
Speed and accuracy of positioning weightless objects as a function of mass, distance and direction
Date
1961
Index Abstract
Not Available
Photo Quality
Undetermined
Report Number
WADD TR 61-182
Creator
Kama, W. N.
Corporate Author
Aerospace Medical Research Laboratory
Laboratory
Wright Air Development Division
Extent
26
Identifier
AD0260131
Access Rights
OTS
Distribution Classification
1
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Abstract
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.
Report Availability
Not available via Contrails
Date Issued
1961-03
Index In
50 Years
Type
report

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