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人手腕部振动强度触觉感知的短时记忆特性

郝飞, 陈丽娟, 卢伟, 宋爱国

东南大学仪器科学与工程学院，南京 210096；中国移动通信集团江苏有限公司研发中心，南京 210012；南京工程学院电力工程学院，南京 211167；南京农业大学工学院，南京 210031

摘要

本文设计了一个回忆性实验和一个再认性实验，使用自行研制的振动触觉表达装置作为实验平台，研究了人手腕部的振动强度触觉感知短时记忆特性。首先通过回忆性实验确定了人手腕部的振动强度触觉感知平均记忆容量(简称振动强度记忆容量)，然后在记忆容量范围内又进行了再认性实验，对人手腕部的振动触觉再认正确率和反应时进行了数据分析。通过实验，我们得到人手腕部振动强度触觉感知相关的5个重要特性：(1)振动强度记忆容量为3 ± 1；(2)振动触觉刺激的振动强度离散间隔越大，振动强度记忆容量就越大；(3)振动强度记忆容量具有显著的性别差异；(4)振动触觉短时记忆信息的提取是逐个比较的遍历扫描过程；(5)触觉感知再认正确率和反应时表现均远逊于视觉和听觉。这些实验结果有助于充分了解人体的触觉感知特性，是振动触觉表达编码方案的重要设计依据。

关键词： 振动触觉表达; 振动强度离散间隔; 振动强度记忆容量; 再认正确率; 反应时

分类号：TP24；B842

[Short-term memory characteristics of vibration intensity tactile perception on human wrist.] [Article in Chinese]

HAO Fei, CHEN Li-Juan, LU Wei, SONG Ai-Guo

Department of Instrument Science and Technology, Southeast University, Nanjing 210096, China； China Mobile Group Jiangsu Co., Ltd., Research and Development Center, Nanjing 210012, China； School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China； College of Engineering, Nanjing Agricultural University, Nanjing 210031, China

Abstract

In this study, a recall experiment and a recognition experiment were designed to assess the human wrist’s short-term memory characteristics of tactile perception on vibration intensity, by using a novel homemade vibrotactile display device based on the spatiotemporal combination vibration of multiple micro vibration motors as a test device. Based on the obtained experimental data, the short-term memory span, recognition accuracy and reaction time of vibration intensity were analyzed. From the experimental results, some important conclusions can be made: (1) The average short-term memory span of tactile perception on vibration intensity is 3 ± 1 items; (2) The greater difference between two adjacent discrete intensities of vibrotactile stimulation is defined, the better average short-term memory span human wrist gets; (3) There is an obvious difference of the average short-term memory span on vibration intensity between the male and female; (4) The mechanism of information extraction in short-term memory of vibrotactile display is to traverse the scanning process by comparison; (5) The recognition accuracy and reaction time performance of vibrotactile display compares unfavourably with that of visual and auditory. The results from this study are important for designing vibrotactile display coding scheme.

Key words: vibrotactile display; discrete intensity of vibration; vibration intensity memory span; recognition accuracy; reaction time

收稿日期：2014-05-21　　录用日期：2014-08-07

通讯作者：宋爱国　　E-mail: a.g.song@seu.edu.cn

引用本文：

郝飞, 陈丽娟, 卢伟, 宋爱国. 人手腕部振动强度触觉感知的短时记忆特性[J]. 生理学报 2014; 66 (6): 683-690.

HAO Fei, CHEN Li-Juan, LU Wei, SONG Ai-Guo. [Short-term memory characteristics of vibration intensity tactile perception on human wrist.] [Article in Chinese]. Acta Physiol Sin 2014; 66 (6): 683-690 (in Chinese with English abstract).