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人手指振动触觉感知的短时记忆特性

童新宇, 吴新, 李思儒, 黄金鹏, 杨文珍^*

浙江理工大学虚拟现实实验室，杭州 310018

摘要

本文旨在探究人手指振动触觉感知的短时记忆特性。采用自制振动触觉表达装置，在20名20~30岁被试(10男，10女)首先进行了一项回忆性实验，确定了手指振动强度触觉感知的记忆容量，然后在该范围内进行了再认性实验，对人手指振动强度触觉感知的再认正确率和被试反应时间进行了分析，得到了以下几个重要特性：(1)人手指振动触觉记忆容量为4 ±1；(2)振动强度间隔越大，手指振动强度记忆容量越大；(3)振动持续时间过长或过短都会导致振动记忆容量减少，男性最佳持续时间为400 ms，女性为300 ms；(4)振动刺激系列越长，再认正确率越低，反应时间越长；(5)振动刺激序列按强度递增或递减的顺序排布要比按混乱的顺序排布更容易记忆；(6)手指振动触觉感知的短时记忆信息提取是按照逐个进行比较的系列扫描方式进行的。这些实验结果有助于了解人手指指尖触觉感知特性，为触觉反馈技术的研究提供生理学依据。

关键词： 振动触觉感知; 振动强度离散间隔; 记忆容量; 再认正确率; 再认反应时

分类号：TP24; B842

Short-term memory characteristics of vibro-tactile perception in human fingertips

TONG Xin-Yu,, WU Xin-Li, LI Si-Ru, HUANG Jin-Peng, YANG Wen-Zhen^*

rtual Reality Laboratory; Zhejiang Sci-Tech University, Hangzhou 310018, China

Abstract

This paper discusses the short-term memory of vibro-tactile perception of human fingertips. By using a self-developed vibro-tactile expression device, a recall experiment was firstly carried out among 20 subjects aged 20–30 (10 males and 10 females) to discover the memory span about the vibro-tactile perception of human fingertips. Within this memory span, a cognitive experiment analyzing the recognition accuracy and the reaction time was carried out. The results showed: (1) The vibro-tactile memory span of human fingertip is 4 ± 1; (2) The vibro-tactile memory span increases as the discrete intensity between vibration stimuli increases; (3) Too long or too short vibration duration will reduce the vibro-tactile memory span, and the optimal vibration duration for men is 400 ms, for women is 300 ms; (4) The more the number of vibration stimuli is perceived by the human fingertip, the lower the recognition accuracy and the longer the reaction time it needs; (5) Compared with the vibration stimuli in disorder, people are more likely to remember the vibration stimuli in increasing/decreasing order; (6) The information extraction mechanism of the short-term memory about fingertip vibro-tactile perception bases a point to point scanning process among these stimuli. These results help to understand the human fingertip tactile characteristics and provide a physiological basis for the study of tactile feedback technologies.

Key words: vibro-tactile perception; discrete vibration of intensity; memory span; recognition accuracy; recognition reaction time

收稿日期：2019-11-08　　录用日期：2020-03-19

通讯作者：杨文珍　　E-mail: ywz@zstu.edu.cn

DOI: 10.13294/j.aps.2020.0054

引用本文：

童新宇, 吴新, 李思儒, 黄金鹏, 杨文珍. 人手指振动触觉感知的短时记忆特性[J]. 生理学报 2020; 72 (5): 643-650.

TONG Xin-Yu,, WU Xin-Li, LI Si-Ru, HUANG Jin-Peng, YANG Wen-Zhen. Short-term memory characteristics of vibro-tactile perception in human fingertips. Acta Physiol Sin 2020; 72 (5): 643-650 (in Chinese with English abstract).