调节是瞳孔测量研究中的混杂因素吗？

Is accommodation a confounder in pupillometry research?

机构信息

Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, the Netherlands.

出版信息

Biol Psychol. 2021 Mar;160:108046. doi: 10.1016/j.biopsycho.2021.108046. Epub 2021 Feb 10.

DOI:10.1016/j.biopsycho.2021.108046

Abstract

Much psychological research uses pupil diameter measurements to investigate the cognitive and emotional effects of visual stimuli. A potential problem is that accommodating at a nearby point causes the pupil to constrict. This study examined to what extent accommodation is a confounder in pupillometry research. Participants solved multiplication problems at different distances (Experiment 1) and looked at line drawings with different monocular depth cues (Experiment 2) while their pupil diameter, refraction, and vergence angle were recorded using a photorefractor. Experiment 1 showed that the pupils dilated while performing the multiplications, for all presentation distances. Pupillary constriction due to accommodation was not strong enough to override pupil dilation due to cognitive load. Experiment 2 showed that monocular depth cues caused a small shift in refraction in the expected direction. We conclude that, for the young student sample we used, pupil diameter measurements are not substantially affected by accommodation.

摘要

许多心理学研究使用瞳孔直径测量来研究视觉刺激的认知和情感效应。一个潜在的问题是，在近点适应会导致瞳孔收缩。本研究考察了调节在瞳孔测量研究中干扰的程度。参与者在不同距离处解决乘法问题（实验 1），并在不同的单眼深度线索下观察线条图（实验 2），同时使用光折射仪记录他们的瞳孔直径、折射和聚散角。实验 1 表明，对于所有呈现距离，参与者在进行乘法时瞳孔会扩张。由于认知负荷引起的瞳孔扩张足以克服由于调节引起的瞳孔收缩。实验 2 表明，单眼深度线索会导致折射出现预期方向的小变化。我们的结论是，对于我们使用的年轻学生样本，瞳孔直径测量不会受到调节的显著影响。