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[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

Received: 2014-05-21　　Accepted: 2014-08-07

Corresponding author: 宋爱国　　E-mail: a.g.song@seu.edu.cn

Citing This Article：

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).