Method and apparatus for determining viewer response to visual s

Details Method and apparatus for determining viewer response to visual s Method and apparatus for determining viewer response to visual s

1983-02-07

1984-11-20

Grieb, William H.

Education and demonstration

Psychology

G09B 502

Patent

active

044836813

ABSTRACT:
A system for monitoring viewer response to visual stimuli having two slide projectors keyed for the simultaneous slide transport and optional viewing modes. The procedure includes projecting images from one slide projector, as seen at a normal viewing distance and providing viewer control for selectively switching to the other slide projector for projecting an enlarged close-up view of the same image. A recording apparatus is included for denoting the subject matter viewed in the enlarged format.

REFERENCES:
patent: 3328803 (1967-06-01), Schwerin
patent: 3388630 (1968-06-01), Leitner
patent: 3622236 (1971-11-01), Novy
patent: 4075657 (1978-02-01), Weinblatt
patent: 4097134 (1978-06-01), Jerie
patent: 4231643 (1980-11-01), Demick et al.

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