Measures Of Remote Manipulator Feedback: Differential Sensitivity For Weight
Report Number: WADD TR 60-591 (I)
Author(s): Crawford, Billy M.
Corporate Author(s): Behavioral Sciences Laboratory; Aerospace Medical Division
Laboratory: Behavioral Sciences Laboratory; Aerospace Medical Laboratory
Date of Publication: 1961-03
Pages: 17
Contract: Laboratory Research - No Contract
DoD Project: 7184
DoD Task: 71586
Identifier: AD0265434
Abstract:
The psychophysical Method of Constant Stimulus Differences was used to determine difference thresholds and Weber ratios for both direct and remote lifting of two standard weight stimuli. A Model 8 Master-Slave Manipulator was used for remote lifting. For 1000-gram weight, difference thresholds were 65.42 and 110.45 grams for direct and remote lifting, respectively. Corresponding difference thresholds for a 3000-gram standard were 149.33 and 195.69 grams. The difference threshold indicates the fineness of weight discrimination which can be expected of a worker. Increases in difference thresholds as a function of remote lifting reflect the loss of "feel" associated with remote handling. The difference threshold is proposed as a criterion of the fidelity of cues reflected to the operator by the remote-handling system.
Provenance: IIT
Author(s): Crawford, Billy M.
Corporate Author(s): Behavioral Sciences Laboratory; Aerospace Medical Division
Laboratory: Behavioral Sciences Laboratory; Aerospace Medical Laboratory
Date of Publication: 1961-03
Pages: 17
Contract: Laboratory Research - No Contract
DoD Project: 7184
DoD Task: 71586
Identifier: AD0265434
Abstract:
The psychophysical Method of Constant Stimulus Differences was used to determine difference thresholds and Weber ratios for both direct and remote lifting of two standard weight stimuli. A Model 8 Master-Slave Manipulator was used for remote lifting. For 1000-gram weight, difference thresholds were 65.42 and 110.45 grams for direct and remote lifting, respectively. Corresponding difference thresholds for a 3000-gram standard were 149.33 and 195.69 grams. The difference threshold indicates the fineness of weight discrimination which can be expected of a worker. Increases in difference thresholds as a function of remote lifting reflect the loss of "feel" associated with remote handling. The difference threshold is proposed as a criterion of the fidelity of cues reflected to the operator by the remote-handling system.
Provenance: IIT