Accession Number:

AD0411240

Title:

OBSERVER TOLLERANCE OF FORM TRANSFORMATION AS A FUNCTION OF FORM COMPLEXITY,

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s):

Report Date:

1963-06-01

Pagination or Media Count:

12.0

Abstract:

The purpose of this study was to determine wheth er observers would tolerate greater transformation of forms of intermediate complexity than forms of high or low complexity. It was assumed that high discrimination threshold values means greater tolerance of form transformation than low thresh old values. Form thresholds of nine irregular shapes were obtained with two highly experienced observers. The shapes were tilted from 15 to 60 degrees from the frontal parallel plane and were shown under clear and noisy conditions.e results indicated that an inverted U relationship exists between mean thresholds and form complex ity. The 6 and 8-sided shapes showed the highest degree of tolerance of form transformation. A medium value of visual noise tended to raise the tolerance level uniformly but slightly. Observer differences were minor probably because the sub jects were highly experienced in similar percep tual studies. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE