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Related Experiment Video

Updated: May 5, 2026

Tactile Semiautomatic Passive-Finger Angle Stimulator TSPAS

Tactile Semiautomatic Passive-Finger Angle Stimulator TSPAS

Published on: July 30, 2020

Assessing Spatial and Spatiotemporal Tactile Working Memory Using Adaptive Staircase Procedures.

Nashmin Yeganeh¹, Ivan Makarov^1,2, Runar Unnthorsson¹

¹The Faculty of Industrial Engineering, Mechanical Engineering, and Computer Science, University of Iceland, 102 Reykjavík, Iceland.

Sensors (Basel, Switzerland)

|May 4, 2026

Summary

This summary is machine-generated.

Tactile working memory capacity is limited, especially when recalling both spatial and temporal information. Recalling only spatial details allows for slightly higher tactile memory capacity.

Keywords:

haptic interface stimuli discrimination tactile feedback tactile working memory vibrotactile patterns vibrotactile wearable device

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Area of Science:

Human-Computer Interaction
Cognitive Psychology
Haptics

Background:

Tactile working memory is crucial for haptic systems but less understood than visual/auditory memory.
Spatial and spatiotemporal tactile working memory require further investigation.

Purpose of the Study:

To quantify tactile working memory capacity for spatial and spatiotemporal sequences.
To understand how temporal order affects tactile memory recall.

Main Methods:

Two psychophysical experiments using vibrotactile stimuli on the forearm.
Adaptive 3-up/1-down staircase procedure to estimate memory thresholds.
Participants reproduced sequences via keypresses.

Main Results:

Ordered recall (spatial and temporal) yielded a capacity threshold of ~4 items.
Unordered recall (spatial only) yielded a higher threshold of ~5 items.
Temporal sequencing significantly increased cognitive load and reduced memory capacity.

Conclusions:

Tactile working memory capacity is constrained by the need to process temporal order.
Findings inform the design of haptic interfaces and sensory substitution technologies.
Cognitive load must be balanced with information complexity in haptic system design.