Teaching visual orientation discrimination through tactile learning
Ding-Zhi Hu; Guo-Zhen Liu; Cong Yu
2017-07
Conference Name2017年第二届曲阜视觉科学会议
Conference Date2017.7.1
Conference Place曲阜
Abstract

PURPOSE: Our double training studies revealed that perceptual learning can generalize to not only new locations and orientations (Xiao et al., 2008; Zhang et al., 2010), but also new physical stimuli encoded at different cortical processing stages (Wang et al., 2016). These results suggest that perceptual learning involves concept learning that improves the abstract concept of a trained feature (e.g., the concept of orientation). Here we demonstrate that such a concept can be represented and improved across the sensory modalities.
METHODS & RESULTS: In Experiment I, participants first practiced tactile orientation discrimination (Tac_ori) using their index fingers that were stimulated by 3D-printed gratings at 40o or 130o. Although training improved Tac_ori thresholds (44.90%, p = 0.036 < 0.05), it had no effect on visual orientation discrimination (Vis_ori) at the trained orientation (p = 0.40) and untrained orthogonal orientation (p = 0.26). The participants then practiced an irrelevant visual contrast discrimination task (Vis_ctrst) at the trained orientation following a sequential double training procedure. After that, Vis_ori was improved at both trained orientation (27.7%, p = 0.012 < 0.05) and untrained orientation (22.5%, p = 0.025 < 0.05). Further training of Vis_ori failed to produce additional gain significantly (p = 0.093). In Experiment II, Tac_ori and Vis_ctrst were trained in the same sessions in alternating blocks of trials, which improved Vis_ori at both trained (26.20%, p = 0.017 < 0.05) and untrained orientation (21.34%, p = 0.025 < 0.05). Further training of Vis_ori did not improve Vis_ori thresholds significantly either (8.33%, p = 0.069). A control condition found that mere Vis_ctrst training had no impact on Vis_ori thresholds (p = 0.16). Therefore, tactile orientation discrimination learning can transfer completely to visual orientation discrimination with double training.
CONCLUSIONS: These results suggest that stimulus orientation as a concept can be represented and improved across tactile and visual modalities. Tactile training of orientation discrimination thus can teach visual orientation discrimination.

KeywordPerceptual Learning concept learning orientation double training
Subject Area视觉注意、学习与记忆
Language英语
Document Type会议论文
Identifierhttp://ir.psych.ac.cn/handle/311026/22045
Collection心理所主办、承办、协办学术会议_2017年第二届曲阜视觉科学会议_会议摘要
AffiliationPsychology, McGovern Brain Research, & Center for Life Sciences, Peking University
Recommended Citation
GB/T 7714
Ding-Zhi Hu,Guo-Zhen Liu,Cong Yu. Teaching visual orientation discrimination through tactile learning[C],2017.
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