ConductCognition

Attention

Psychomotor Vigilance Task

Track sustained attention, lapses, and fatigue-sensitive vigilance performance in the browser.

Useful for sleep, fatigue, operational-performance, and sedation-sensitive research settings.

Attention4-6 minBrowser-based testing workflow
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What this task measures

Measures sustained attention by requiring rapid responses to infrequent visual targets over variable waiting intervals.

Core constructs

  • Sustained attention
  • Vigilance stability
  • Fatigue sensitivity
  • Alertness regulation

Research fit

  • Sleep deprivation studies
  • Fatigue monitoring in shift-work cohorts
  • Medication sedation profiling
  • Longitudinal attention stability tracking

Why researchers use ConductCognition

  • Hosted browser delivery with no local install burden for participants.
  • Study setup, scoring, exports, and participant links in one workflow.
  • Transparent pricing instead of opaque enterprise quoting for solo labs.
  • Free entry tier plus Academic Pro when you need the full battery and trial-level exports.

Paradigm overview

The Psychomotor Vigilance Task (PVT) measures sustained attention by requiring immediate responses to infrequent visual targets after unpredictable waiting intervals. This structure minimizes strategic anticipation and isolates vigilance decline over time.

Unlike short burst reaction-time paradigms, PVT emphasizes attentional stability. A participant may begin with fast responses but accumulate lapses (very slow or missed responses) as fatigue, sleep pressure, or reduced alertness increases.

The PVT is widely used in sleep, fatigue, and operational-performance research because lapse counts and response variability are highly sensitive to vigilance impairment.

Key scoring outputs

Mean Reaction Time

ms

Average valid response latency across scored trials.

Lower is better

Median Reaction Time

ms

Median response latency, less influenced by outlier lapses.

Lower is better

RT Standard Deviation

ms

Intraindividual variability of response speed.

Lower is better

Lapses

count

Missed responses or responses slower than the lapse threshold.

Lower is better

False Starts

count

Anticipatory responses under 100ms.

Lower is better

Response Rate

proportion

Proportion of trials with any response before timeout.

Higher is better

Research evidence and scoring context

No platform-matched normative source is currently seeded for this task in ConductCognition.

Reference reviewedN/A

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Related task pages

Simple Reaction TimeChoice Reaction TimeGo/No-Go Task

Research FAQ

Common questions about this online cognitive test

Can I run the Psychomotor Vigilance Task online?

Yes. ConductCognition runs the Psychomotor Vigilance Task in a browser-based participant flow with study setup, automated scoring, and export-ready results.

What does this test measure?

Psychomotor Vigilance Task is used for sustained attention, vigilance stability, fatigue sensitivity research workflows.

What data can researchers export?

Researchers can export scored results, and paid plans support trial-level exports for deeper analysis.

Is this for clinical diagnosis?

ConductCognition is for research use. The platform supports task delivery, scoring, and exports; clinical interpretation remains outside the platform.