TY  - JOUR
AU  - Harris, J. W. C.
AU  - Yildiz, G. Y.
AU  - Chouinard, P. A.
TI  - The role of line-orientation processing in the production of the Poggendorff illusion: A dual-task study
JO  - Attention, perception, & psychophysics
VL  - 85
IS  - 6
SN  - 1943-3921
CY  - New York, NY
PB  - Springer
M1  - FZJ-2023-01607
SP  - 2033 - 2045
PY  - 2023
AB  - Using a dual-task paradigm, the present investigation examined whether processes related to line orientation play a critical role in the production of the Poggendorff illusion. In Experiment 1, we assessed the magnitude of the Poggendorff illusion under three different task conditions. In the single-task condition, participants were asked to report how they perceive the alignment of transversal lines in the Poggendorff figure. In two different dual-task conditions, the participants were asked to read aloud the time displayed on a digital or analogue clock while also performing the Poggendorff perception task. The method of constant stimuli was used to calculate the point of subjective equality (PSE) and bistability width values, which represent illusion strength and perceptual uncertainty, respectively. PSEs indicated that the magnitude of the illusion did not vary between single, dual-analogue, and dual-digital task conditions, which suggests that the additional demands placed by the dual tasks had no effect on the illusion strength. Perceptual uncertainty and clock-reading errors were greater in the dual-analogue task condition. Experiment 2 revealed that the analogue clockface was more difficult to read than the digital clockface. Based on these results, we conclude that having participants perform a secondary task does not influence the magnitude of the Poggendorff illusion.
LB  - PUB:(DE-HGF)16
C6  - 36949260
UR  - <Go to ISI:>//WOS:000957512200001
DO  - DOI:10.3758/s13414-023-02660-1
UR  - https://juser.fz-juelich.de/record/1005735
ER  -