视知觉学习对于识别动态随机点立体图深度运动方向的作用（英文）

Motion-in-depth Direction Discrimination in Dynamic Random Dot Stereogram: The Role of Visual Perceptual Training

立体视觉不仅指对静态深度信息的感知,也包括对物体在三维空间中的运动方向的判断.本研究记录了人眼对于动态随机点图运动方向的辨别能力以及视觉训练在提高对动态信息分辨能力的作用.实验结果表明,对于没有任何相关经验的视力正常的受试者,很难分辨出动态随机点的深度运动方向,而视觉训练可以大大提高人眼对物体深度运动方向判断的敏感度.此外,这种视觉训练所达到的效果具有较长时间的持续性(至少6个月).这种通过视觉训练提高受试者对立体运动信息敏感度的方式,为立体视觉相关的实验和研究提供了新的视角.

Stereopsis is not only the perception of static depth information, but also involves the ability to detect dynamic stereoscopic motion. This study investigated the motion-in-depth（MID） perception in dynamic random dot stereogram（DRDS） among the population of inexperienced normal vision observers, and the role of visual perceptual training for MID perception. There were three sessions in the main experiment： in the pre-training session, subjects were instructed to discriminate the motion direction of DRDS moving in depth（toward or away from the observer）. Then subjects went through a perceptual training session to improve their sensitivity for the motion detection discrimination. A post-training session was carried out to evaluate the outcome of the training process. A control experiment involving only pre-training and post-training sessions was carried out to clarify the influence of repeated practice on visual performance improvement. Participants showed low direction discrimination ability for MID perception of DRDS in the pre-training session, their performance was significantly improved after the perceptual training session. However, large individual difference existed for fully perceiving the binocular disparity information during perceptual learning session. Moreover, the training effect was equivalently retained after six months. The subjects＇ performances in the control experiment did not show significantly difference between pre-training and post-training sessions. These findings demonstrate that difficulties for DRDS motion perception exist for inexperienced observers, and highlight the role of visual perceptual training.