Mather, George and Challinor, K. L. (2009) Psychophysical properties of two-stroke apparent motion. Journal of Vision, 9 (1). pp. 1-6. ISSN 1534-7362
Full content URL: http://www.journalofvision.org/content/9/1.toc
Documents |
|
![]() |
PDF
Mather_Challinor_2009.pdf - Whole Document Restricted to Repository staff only 386kB |
Item Type: | Article |
---|---|
Item Status: | Live Archive |
Abstract
In two-stroke apparent movement, repeated presentation of a two-frame pattern displacement followed by a brief inter-stimulus
interval (ISI) can create an impression of continuous forward motion (G. Mather, 2006). Does the ISI in two-stroke motion
just break the connection between adjacent frames, switching off the motion signal they normally generate, or does it
actually generate a reversed motion signal? Reversed apparent motion in two-frame stimuli separated by a brief ISI has
been reported in several previous papers (ISI reversal), which found that the effect is optimal at short, mean-luminance
ISIs, and is abolished at scotopic luminances. A series of five experiments compared two-stroke apparent motion with ISI
reversal using the same stimulus display. The two effects show the same dependence on ISI duration and luminance and
are both abolished at low mean luminance. Results therefore support the conclusion that the ISI in two-stroke apparent
motion does contribute a reversed motion signal and constrain theoretical explanations of two-stroke apparent motion.
Additional Information: | In two-stroke apparent movement, repeated presentation of a two-frame pattern displacement followed by a brief inter-stimulus interval (ISI) can create an impression of continuous forward motion (G. Mather, 2006). Does the ISI in two-stroke motion just break the connection between adjacent frames, switching off the motion signal they normally generate, or does it actually generate a reversed motion signal? Reversed apparent motion in two-frame stimuli separated by a brief ISI has been reported in several previous papers (ISI reversal), which found that the effect is optimal at short, mean-luminance ISIs, and is abolished at scotopic luminances. A series of five experiments compared two-stroke apparent motion with ISI reversal using the same stimulus display. The two effects show the same dependence on ISI duration and luminance and are both abolished at low mean luminance. Results therefore support the conclusion that the ISI in two-stroke apparent motion does contribute a reversed motion signal and constrain theoretical explanations of two-stroke apparent motion. |
---|---|
Keywords: | apparent motion, temporal response, two-stroke apparent motion |
Subjects: | C Biological Sciences > C800 Psychology C Biological Sciences > C850 Cognitive Psychology |
Divisions: | College of Social Science > School of Psychology |
Related URLs: | |
ID Code: | 4737 |
Deposited On: | 13 Oct 2011 11:17 |
Repository Staff Only: item control page