Postma, Hannah (2024) Sleep Deprivation and Near-Threshold Detection Across the Visual Field: A Pupillometry Study. Bachelor thesis, Psychology.
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Abstract
In recent years, with the rise of sleep issues and increased awareness of their risks, there has been growing interest in objectively measuring sleepiness. Previous research has linked sleep deprivation to a smaller baseline pupil size and increased variability in low-light conditions, likely due to alterations in locus coeruleus activity and subsequent changes in noradrenaline levels. Since the locus coeruleus indirectly affects visual perceptual sensitivity, sleep deprivation may impact this aspect as well. This study aimed to investigate whether short-term sleep deprivation, defined as reporting less than 7 hours of sleep the previous night, is associated with reduced baseline pupil size, increased variability, and altered sensitivity. Participants (N = 66) took part in a near-threshold visual detection task while their pupils were recorded, preceded by a 5-minute baseline measurement. In the task, they were required to indicate the detection of briefly flashed red and blue targets with diminishing opacity. The results did not show an effect of short-term sleep deprivation on baseline pupillary measures or sensitivity for blue targets. However, a significant effect of sleep deprivation on sensitivity for red targets was observed, suggesting that sleep deprivation relates to impaired perceptual sensitivity for red targets.
| Item Type: | Thesis (Bachelor) |
|---|---|
| Supervisor name: | Ruuskanen, V.H.S. |
| Degree programme: | Psychology |
| Differentiation route: | None [Bachelor Psychology] |
| Date Deposited: | 19 Jul 2024 11:34 |
| Last Modified: | 19 Jul 2024 11:34 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/3988 |
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