Pupil diameter must be controlled for lighting in listening-effort experiments

Evidence

This overall smaller increase in pupil dilation can be explained by the fact that these curves are normalized to a baseline of 200 ms preceding the presentation of each critical item per trial, participant and condition. Listening to degraded speech is by itself more effortful than listening to natural speech (e.g., Winn et al. 2015 ), and therefore there is a difference in the baseline between DS and NS. These differences in the baseline can be explained by the difference in processing degraded versus natural speech, and are independent of the effects of semantic integration on lexical competition. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3994 (#expands, via linked claim)

Categorization

• XREF: connects to: Baseline pupil dilation already differs before any target word because degraded listening is effortful — Dijk, Pim van, Physiology, Psychoacoustics and…, 3994

Related

• Baseline pupil dilation already differs before any target word because degraded listening is effortful (similarity 0.94)
• Degraded speech raises baseline listening effort independent of lexical competition effects (similarity 0.90)
• Pupil dilation serves as a continuous measure of listening effort during speech comprehension (similarity 0.90)
• Baseline-normalized pupillometry underestimates effort from continuous degradation. (similarity 0.86)
• Sentential context reduces lexical competition effort, but degraded speech delays that reduction (similarity 0.82)
• Degraded speech delays lexical competition toward phonological competitors by about 300 ms (similarity 0.81)
• Pupil dilation indicates cognitive effort on a distinct 900 ms timescale (similarity 0.81)
• Signal degradation delays semantic integration and raises listening effort (similarity 0.81)
• Degraded speech delays semantic integration and blocks contextual relief of effort (similarity 0.81)
• Degraded speech processing raises baseline cognitive effort independently of semantic context (similarity 0.80)
• Semantic knowledge helps listeners interpret degraded speech signals (similarity 0.79)

Broader Connections

• Baseline pupil dilation already differs before any target word because degraded listening is effortful #expands (0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3994