Accession Number:

ADA048620

Title:

Identification and Scaling of Complex Visual Patterns.

Descriptive Note:

Technical rept.,

Corporate Author:

BOLT BERANEK AND NEWMAN INC CAMBRIDGE MASS

Report Date:

1977-11-01

Pagination or Media Count:

39.0

Abstract:

Experiments were conducted to examine the detection and identification of complex visual patterns, representing various underwater sounds, in terms of stimulus dimensions indicated by a psychological scaling analysis of similarity judgments. Psychological dimensions differed somewhat between naive and experienced observers, and between visual and auditory representations, but high correlations with physical dimensions were found in all cases. A second objective of the study was to relate identification to detection, over successive stages of relatively long signals. The ROC analysis developed for detection of signals in random noise was applied to discrimination of wanted and unwanted signals. The analysis of stimulus dimensions enabled qualitative predictions of the relative levels of detection and identification for different sets of wanted and unwanted signals. The joint ROC, based on the probability of correct detection and correct identification, provided quantitative benchmarks for these predictions. Author

Subject Categories:

  • Acoustic Detection and Detectors
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE