Validity and sensitivity of a brief psychomotor vigilance test (PVT-B) to total and partial sleep deprivation
DOI: 10.1016/j.actaastro.2011.07.015
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Summary
This study addresses the practical limitations of the standard 10-minute Psychomotor Vigilance Test (PVT), which is widely used to assess fatigue-related alertness but often deemed too lengthy for operational settings. The authors developed and validated a brief 3-minute version (PVT-B) to determine if it retains sufficient sensitivity to detect performance deficits caused by total sleep deprivation (TSD) and partial sleep deprivation (PSD). The research was motivated by the need for a concise, reliable tool for fitness-for-duty testing in safety-critical environments, such as space flight and shift work, where repeated administrations are necessary. The validation involved 74 healthy subjects across two controlled laboratory protocols. In the TSD study, 31 subjects remained awake for 33 hours, performing both the standard PVT and PVT-B regularly. In the PSD study, 43 subjects underwent five consecutive nights of sleep restricted to four hours. The PVT-B utilized a handheld device with shorter inter-stimulus intervals (1–4 seconds) compared to the standard computer-based PVT (2–10 seconds). The authors analyzed five key outcome metrics: reciprocal response time (speed), slowest 10% response time, number of lapses, fastest 10% response time, and a composite performance score. Statistical analyses included mixed-model ANOVAs and effect size calculations to compare the sensitivity of both tests to sleep loss. Results indicated that while the PVT-B reduced test duration by 70%, the average decrease in effect size was only 22.7%, which the authors deemed an acceptable trade-off. Effect sizes for the PVT-B were large for TSD and medium-to-large for PSD, particularly for response speed. Initially, the PVT-B yielded faster response times, more false starts, and fewer lapses than the standard PVT. However, when the lapse threshold for the PVT-B was adjusted from 500 ms to 355 ms to account for the shorter duration, mixed-model ANOVAs showed no differential sensitivity to sleep loss between the two tests for most variables. This adjustment increased the effect sizes for lapses, aligning the PVT-B’s sensitivity with the standard PVT. The study concludes that the PVT-B effectively tracks standard PVT performance throughout both total and partial sleep deprivation, yielding robust effect sizes. By maintaining sensitivity while significantly reducing administration time, the PVT-B offers a practical alternative for assessing behavioral alertness in settings where the 10-minute test is impractical. The authors recommend further validation in applied operational settings but affirm the PVT-B’s utility as a sensitive and specific tool for detecting neurobehavioral impairment due to sleep loss.
Key finding
The brief 3-minute PVT-B retained medium to large effect sizes for detecting sleep deprivation-induced performance decrements and tracked standard PVT performance closely, making it a viable alternative for operational settings.
Methodology
lab_experiment
Sample size: 74
Provenance
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | author_sweep | — | — | 2 | 2026-05-27 |
| archive | success | canonical_url | — | — | 13 | 2026-06-06 |
| extract | success | cached | — | — | 3 | 2026-06-10 |
| clean | success | clean | — | — | 1 | 2026-06-04 |
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| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-04 |
| enrich | skipped | — | — | — | 3 | 2026-06-04 |
| promote | success | — | — | — | 1 | 2026-06-04 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 2 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 15 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Methodological Resource: validation psychometrics