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Effects of Stimulus Exploration Length and Time on the Integration of Information in Haptic Softness Discrimination.

Metzger, A. and Drewing, K., 2019. Effects of Stimulus Exploration Length and Time on the Integration of Information in Haptic Softness Discrimination. IEEE Transactions on Haptics, 12 (4), 451-460.

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DOI: 10.1109/TOH.2019.2899298

Abstract

In haptic perception, information is often sampled serially (e.g., a stimulus is repeatedly indented to estimate its softness), requiring that sensory information is retained and integrated over time. Hence, integration of sequential information is likely affected by memory. Particularly, when two sequentially explored stimuli are compared, integration of information on the second stimulus might be determined by the fading representation of the first stimulus. We investigated how the exploration length of the first stimulus and a temporal delay affect contributions of sequentially gathered estimates of the second stimulus in haptic softness discrimination. Participants subsequently explored two silicon rubber stimuli by indenting the first stimulus one or five times and the second stimulus always three times. In an additional experiment, we introduced a 5-s delay after the first stimulus was indented five times. We show that the longer the first stimulus is explored, the more estimates of the second stimulus' softness contribute to the discrimination of the two stimuli, independent of the delay. This suggests that the exploration length of the first stimulus influences the strength of its representation, persisting at least for 5 s, and determines how much information about the second stimulus is exploited for the comparison.

Item Type:Article
ISSN:1939-1412
Uncontrolled Keywords:Human perception; stiffness; serial integration; sequential integration
Group:Faculty of Science & Technology
ID Code:37188
Deposited By: Symplectic RT2
Deposited On:14 Jul 2022 12:05
Last Modified:14 Jul 2022 12:05

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