THE ILLUSORY PERCEPTION OF MOVEMENT CAUSED BY ANGULAR ACCELERATION AND BY CENTRIFUGAL FORCE DURING FLIGHT. II. VISUALLY PERCEIVED MOVEMENT OF A FIXED TARGET DURING TURNS.
Abstract
The oculo-gyral and oculo-gravic illusions were studied in flight using three trained subjects who observed a fixed luminous target in the dark. The results show that illusions of motion and displacement may occur during all degrees of bank for 10 to 60 degrees, and always occurred during banks of 40 degrees and above. There is a direct relation between the degree of bank and the amount of motion and displacement observed; the maximum observed displacement of the star from the 'true' position was 50 degrees. All displacements were observed in or close to the vertical plane whereas motion was observed not only upward and downward but to the right and left. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 16, 1946
- Accession Number
- AD0468152
Entities
People
- Ashton Graybiel
- Brant Clark
- Kenneth Maccorquodale