TY  - JOUR
A1  - Kirsch, Wladimir
A1  - Kunde, Wilfried
T1  - Changes in body perception following virtual object manipulation are accompanied by changes of the internal reference scale
JF  - Scientific Reports
N2  - Changes in body perception often arise when observers are confronted with related yet discrepant multisensory signals. Some of these effects are interpreted as outcomes of sensory integration of various signals, whereas related biases are ascribed to learning-dependent recalibration of coding individual signals. The present study explored whether the same sensorimotor experience entails changes in body perception that are indicative of multisensory integration and those that indicate recalibration. Participants enclosed visual objects by a pair of visual cursors controlled by finger movements. Then either they judged their perceived finger posture (indicating multisensory integration) or they produced a certain finger posture (indicating recalibration). An experimental variation of the size of the visual object resulted in systematic and opposite biases of the perceived and produced finger distances. This pattern of results is consistent with the assumption that multisensory integration and recalibration had a common origin in the task we used.
KW  - human behaviour
KW  - perception
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-357876
VL  - 13
ER  - 
TY  - JOUR
A1  - Kirsch, Wladimir
A1  - Kitzmann, Tim
A1  - Kunde, Wilfried
T1  - Action affects perception through modulation of attention
JF  - Attention, Perception & Psychophysics
N2  - The present study explored the origin of perceptual changes repeatedly observed in the context of actions. In Experiment 1, participants tried to hit a circular target with a stylus movement under restricted feedback conditions. We measured the perception of target size during action planning and observed larger estimates for larger movement distances. In Experiment 2, we then tested the hypothesis that this action specific influence on perception is due to changes in the allocation of spatial attention. For this purpose, we replaced the hitting task by conditions of focused and distributed attention and measured the perception of the former target stimulus. The results revealed changes in the perceived stimulus size very similar to those observed in Experiment 1. These results indicate that action's effects on perception root in changes of spatial attention.
KW  - perception
KW  - action
KW  - attention
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-273176
SN  - 1943-393X
VL  - 83
IS  - 5
ER  - 
TY  - JOUR
A1  - Kirsch, Wladimir
A1  - Ullrich, Benjamin
A1  - Kunde, Wilfried
T1  - Are Effects of Action on Perception Real? Evidence from Transformed Movements
JF  - PLoS ONE
N2  - It has been argued that several reported non-visual influences on perception cannot be truly perceptual. If they were, they should affect the perception of target objects and reference objects used to express perceptual judgments, and thus cancel each other out. This reasoning presumes that non-visual manipulations impact target objects and comparison objects equally. In the present study we show that equalizing a body-related manipulation between target objects and reference objects essentially abolishes the impact of that manipulation so as it should do when that manipulation actually altered perception. Moreover, the manipulation has an impact on judgements when applied to only the target object but not to the reference object, and that impact reverses when only applied to the reference object but not to the target object. A perceptual explanation predicts this reversal, whereas explanations in terms of post-perceptual response biases or demand effects do not. Altogether these results suggest that body-related influences on perception cannot as a whole be attributed to extra-perceptual factors.
KW  - vision
KW  - preprocessing
KW  - analysis of variance
KW  - sensory perception
KW  - hands
KW  - fingers
KW  - experimental design
KW  - perception
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-178574
VL  - 11
IS  - 12
ER  -