Contrast Discrimination Task
Objective: Measure contrast perception thresholds by having monkeys discriminate the orientation of stationary gratings at varying contrast levels
This is a Contrast Discrimination Task protocol using rhesus monkey as the model organism. The procedure involves 3 procedural steps, 1 equipment items. Extracted from a 1988 paper published in Journal of Neuroscience.
Model and subjects
rhesus monkey
Study window
Estimated timing pending
Core workflow
Train monkeys on contrast discrimination task • Present stationary gratings at varying contrast levels • Measure contrast discrimination threshold
Primary readouts
- Threshold contrast level for successful grating orientation discrimination
- Monkey's sensitivity to contrast perception
Key equipment and reagents
Verified items
0
Direct vendor links
0
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Protocol Steps
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Train monkeys on contrast discrimination task
Rhesus monkeys were trained on a psychophysical task to discriminate the orientation of stationary gratings
Note: Training enabled assessment of sensitivity to contrast
View evidence from paper
“We trained rhesus monkeys on psychophysical tasks that enabled us to assess their sensitivity to motion and to contrast.”
Present stationary gratings at varying contrast levels
Display stationary gratings with systematically varied contrast levels to the monkey
Note: Contrast intensity was varied to determine threshold
View evidence from paper
“In the contrast task, we measured the threshold contrast for which the monkeys could successfully discriminate the orientation of stationary gratings.”
Measure contrast discrimination threshold
Determine the threshold contrast level at which the monkey could successfully discriminate grating orientation
Note: Threshold is the minimum contrast intensity for successful discrimination
View evidence from paper
“we measured the threshold contrast for which the monkeys could successfully discriminate the orientation of stationary gratings.”