Abstract

Threshold energy for a test flash was determined (with three subjects) in the presence of an adjacent steady inducer. The purpose was to investigate the effects of different test durations on the inducer’s ability to raise threshold. Changes of test duration from 12.5 to 1000 ms were found to account for a 60% increase of inducer effectiveness at the closest test–inducer separation (8.6′). Increases of separation to 190′ produced decrements of this test-duration effect. These results bear on questions concerned with test duration as a variable of perceived contrast and possible underlying mechanisms.

© 1974 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Foveal increment thresholds for multiple flashes*

Robert M. Herrick
J. Opt. Soc. Am. 63(7) 870-878 (1973)

Absolute Threshold before and after Correction of Oblique-Ray Astigmatism

Lucia Ronchi
J. Opt. Soc. Am. 61(12) 1705-1709 (1971)

Increment Thresholds for Two Identical Flashes*

Robert M. Herrick
J. Opt. Soc. Am. 62(1) 104-110 (1972)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription