Discrimination of Differences in Mass of Weightless Objects
Title | Discrimination of Differences in Mass of Weightless Objects PDF eBook |
Author | David W. Rees |
Publisher | |
Pages | 30 |
Release | 1960 |
Genre | Astronautics |
ISBN |
"Absence of gravity results in the loss of many familiar kinesthetic cues of weight and friction necessary to man for object discrimination and manipulation. Man's ability to discriminate small differences in mass as opposed to small differences in weight was studied. Four weight series were used, each consisting of a standard (1000, 3000, 5000, or 7000 grams) and nine comparison stimuli. Judgments for mass differences were made with the same weights supported by compressed air on an air-bearing table. Thus, the frictionless aspect of a weightless environment was simulated. Results show that the mean difference limen, mean standard deviation, and Weber ratio (∆ S/S) for each standard are much larger for mass than for weight. Thus, to be detected under a weightless condition, mass increments must be at least twice as large as the weight increments required for discrimination in a normal weight-lifting situation. "--Abstract.
Discrimination of Differences in Mass of Weightless Objects
Title | Discrimination of Differences in Mass of Weightless Objects PDF eBook |
Author | David W. Rees |
Publisher | |
Pages | 20 |
Release | 1960 |
Genre | Astronautics |
ISBN |
"Absence of gravity results in the loss of many familiar kinesthetic cues of weight and friction necessary to man for object discrimination and manipulation. Man's ability to discriminate small differences in mass as opposed to small differences in weight was studied. Four weight series were used, each consisting of a standard (1000, 3000, 5000, or 7000 grams) and nine comparison stimuli. Judgments for mass differences were made with the same weights supported by compressed air on an air-bearing table. Thus, the frictionless aspect of a weightless environment was simulated. Results show that the mean difference limen, mean standard deviation, and Weber ratio (∆ S/S) for each standard are much larger for mass than for weight. Thus, to be detected under a weightless condition, mass increments must be at least twice as large as the weight increments required for discrimination in a normal weight-lifting situation. "--Abstract.
A Bibliography of Reports Issued by the Behavioral Sciences Laboratory
Title | A Bibliography of Reports Issued by the Behavioral Sciences Laboratory PDF eBook |
Author | Aerospace Medical Research Laboratories (U.S.). Behavioral Sciences Laboratory |
Publisher | |
Pages | 92 |
Release | 1946 |
Genre | Aviation medicine |
ISBN |
Bibliography of Reports
Title | Bibliography of Reports PDF eBook |
Author | United States. Wright Air Development Division. Behavioral Sciences Laboratory |
Publisher | |
Pages | 120 |
Release | 1963 |
Genre | |
ISBN |
Technical Publications Announcements with Indexes
Title | Technical Publications Announcements with Indexes PDF eBook |
Author | United States. National Aeronautics and Space Administration |
Publisher | |
Pages | 1556 |
Release | 1962 |
Genre | Aeronautics |
ISBN |
Human Factors of Remote Handling in Advanced Systems
Title | Human Factors of Remote Handling in Advanced Systems PDF eBook |
Author | |
Publisher | |
Pages | 208 |
Release | 1961 |
Genre | |
ISBN |
ASD Technical Report
Title | ASD Technical Report PDF eBook |
Author | United States. Air Force. Systems Command. Aeronautical Systems Division |
Publisher | |
Pages | 208 |
Release | 1961 |
Genre | Aeronautics |
ISBN |