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This task measures sustained attention and reaction time. A light blinks randomly and the subject is asked to press a button when the they see it. The focus is not on how quickly the subject notices the light, but how often the subject doesn't notice the light. It is often used to study the effects of sleep deprivation and sleep debt.
Synonyms: psychomotor vigilance task (PVT)
Definition contributed by CTorgerson about five years ago

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PEBL Perceptual Vigilance Task (PPVT) has been asserted to measure the following CONCEPTS
as measured by the contrast:

DISORDERS associated with PEBL Perceptual Vigilance Task (PPVT)
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IMPLEMENTATIONS of PEBL Perceptual Vigilance Task (PPVT)
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EXTERNAL DATASETS for PEBL Perceptual Vigilance Task (PPVT)
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Experimental conditions are the subsets of an experiment that define the relevant experimental manipulation.


In the Cognitive Atlas, we define a contrast as any function over experimental conditions. The simplest contrast is the indicator value for a specific condition; more complex contrasts include linear or nonlinear functions of the indicator across different experimental conditions.


An indicator is a specific quantitative or qualitative variable that is recorded for analysis. These may include behavioral variables (such as response time, accuracy, or other measures of performance) or physiological variables (including genetics, psychophysiology, or brain imaging data).

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