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Psychophysics with children: Investigating the effects of attentional lapses on threshold estimates

Manning, C., Jones, P. R. ORCID: 0000-0001-7672-8397, Dekker, T. M. & Pellicano, E. (2018). Psychophysics with children: Investigating the effects of attentional lapses on threshold estimates. Attention, Perception, & Psychophysics, 80(5), pp. 1311-1324. doi: 10.3758/s13414-018-1510-2


When assessing the perceptual abilities of children, researchers tend to use psychophysical techniques designed for use with adults. However, children’s poorer attentiveness might bias the threshold estimates obtained by these methods. Here, we obtained speed discrimination threshold estimates in 6- to 7-year-old children in UK Key Stage 1 (KS1), 7- to 9-year-old children in Key Stage 2 (KS2), and adults using three psychophysical procedures: QUEST, a 1-up 2-down Levitt staircase, and Method of Constant Stimuli (MCS). We estimated inattentiveness using responses to “easy” catch trials. As expected, children had higher threshold estimates and made more errors on catch trials than adults. Lower threshold estimates were obtained from psychometric functions fit to the data in the QUEST condition than the MCS and Levitt staircases, and the threshold estimates obtained when fitting a psychometric function to the QUEST data were also lower than when using the QUEST mode. This suggests that threshold estimates cannot be compared directly across methods. Differences between the procedures did not vary significantly with age group. Simulations indicated that inattentiveness biased threshold estimates particularly when threshold estimates were computed as the QUEST mode or the average of staircase reversals. In contrast, thresholds estimated by post-hoc psychometric function fitting were less biased by attentional lapses. Our results suggest that some psychophysical methods are more robust to attentiveness, which has important implications for assessing the perception of children and clinical groups.

Publication Type: Article
Additional Information: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Publisher Keywords: Signal detection theory Attention Development
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RE Ophthalmology
R Medicine > RJ Pediatrics > RJ101 Child Health. Child health services
Departments: School of Health & Psychological Sciences > Optometry & Visual Sciences
SWORD Depositor:
[thumbnail of Manning2018_Article_PsychophysicsWithChildrenInves.pdf]
Text - Accepted Version
Available under License Creative Commons Attribution.

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