Abstract
Previous studies have shown that visual distortions of a body part can affect spatial tactile judgements. For example, visually enlarging the arm
results in enhanced spatial discrimination. Others have proposed that spatial and temporal processing is highly related. This may also be the
case for tactile perception, which is inherently spatiotemporal. In the current study we tested whether a stretched hand illusion influences
temporal judgements of touches on that hand.
48 participants performed tactile temporal order judgements, while viewing their hand in a mediated reality set-up under two different conditions:
while experiencing the stretched hand illusion, or with an undistorted view of the hand. 10 different stimulus onset asynchronies ranging were
used. We fitted a psychometric curve for each participant and condition and extracted the slope at the inflection point, a measure of the
discriminability of the stimuli.
The results showed that when the index finger appeared to be longer, the slope was significantly steeper, suggesting that participants were
better able to determine the temporal order of the tactile stimuli.
This finding shows that a visual illusion of finger size, and thus body perception, influences temporal tactile processing and suggests that time
perception and body size perception are linked.
results in enhanced spatial discrimination. Others have proposed that spatial and temporal processing is highly related. This may also be the
case for tactile perception, which is inherently spatiotemporal. In the current study we tested whether a stretched hand illusion influences
temporal judgements of touches on that hand.
48 participants performed tactile temporal order judgements, while viewing their hand in a mediated reality set-up under two different conditions:
while experiencing the stretched hand illusion, or with an undistorted view of the hand. 10 different stimulus onset asynchronies ranging were
used. We fitted a psychometric curve for each participant and condition and extracted the slope at the inflection point, a measure of the
discriminability of the stimuli.
The results showed that when the index finger appeared to be longer, the slope was significantly steeper, suggesting that participants were
better able to determine the temporal order of the tactile stimuli.
This finding shows that a visual illusion of finger size, and thus body perception, influences temporal tactile processing and suggests that time
perception and body size perception are linked.
| Original language | English |
|---|---|
| Publication status | Published - 2023 |
| Event | 19th NVP Dutch Society for Brain and Cognition Winter Conference - Egmond aan Zee, Netherlands Duration: 14 Dec 2023 → 16 Dec 2023 |
Conference
| Conference | 19th NVP Dutch Society for Brain and Cognition Winter Conference |
|---|---|
| Country/Territory | Netherlands |
| City | Egmond aan Zee |
| Period | 14/12/23 → 16/12/23 |