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Amplitude and period discrimination of haptic stimuli

 

作者: Martha A. Rinker,   James C. Craig,   Lynne E. Bernstein,  

 

期刊: The Journal of the Acoustical Society of America  (AIP Available online 1998)
卷期: Volume 104, issue 1  

页码: 453-463

 

ISSN:0001-4966

 

年代: 1998

 

DOI:10.1121/1.423249

 

出版商: Acoustical Society of America

 

数据来源: AIP

 

摘要:

As part of a project to examine the ability of the hand to receive speech information, the present study examined subjects’ ability to discriminate finger movements along the dimensions of amplitude and period (movement duration). The movements consisted of single-cycle, sinewave movements and single-cycle, cosine movements presented to the index finger. Difference thresholds were collected using an adaptive, two-interval, temporal forced-choice procedure. Amplitudes from 6 to 19 mm were examined, and the difference thresholds ranged from 10% to 18%. The thresholds were unaffected by the period of the movement. Periods from 3000 to 111 ms (0.33–9 Hz) were examined, and thresholds ranged from 6% to 16%. The thresholds were unaffected by the amplitude of the movement. Further measurements in which period was varied in the amplitude discrimination task and amplitude was varied in the period discrimination task indicated that subjects were not using peak velocity as the basis for discrimination. These measurements were collected using a display specifically designed for the examination of haptic stimulation and capable of presenting controlled patterns of movement and vibration to the fingers.

 

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