Suárez-Pinilla, M;
Seth, AK;
Roseboom, W;
(2018)
Serial dependence in perception: decision making, metacognition and awareness.
Presented at: 22nd Annual Meeting of the Association for the Scientific Study of Consciousness (ASSC), Krakow, Poland.
Preview |
Text
Serial_dependence_ASSC_2018.pdf - Published Version Download (1MB) | Preview |
Abstract
Serial dependence (SD) describes a phenomenon whereby perceptual judgments are attracted towards recent, briefly presented stimuli. SD exists for both low and high-level perceptual dimensions, suggesting a central role in shaping visual experience. Nevertheless, there is debate about whether SD arises in low-level perceptual and/or higher-level decision processing, such as working memory. Furthermore, the relationship of SD to metacognitive processes and perceptual awareness remains unclear. In a series of studies, we explored how decision making, confidence and perceptual awareness constrain SD in visual variance and orientation. Our experiments showed that past stimuli exert SD on subsequent presentations in the presence of high decisional confidence over the past decision, contiguity of feature dimension about which the past and present decisions are made and perceptual awareness of the past stimulus. In addition, time manipulations of the trial sequence suggested that the duration of SD-like influence of a past stimulus is affected by both time-related (passive) decline and active maintenance of the current presentation in working memory - so that a longer interval between current stimulus and response increases the bias toward previous stimuli. In conclusion, serial dependence is consistent with high-level process of iterative (Bayesian-like) biases in decision rather than perception and only occurs in the presence of high decisional confidence and perceptual awareness.
Archive Staff Only
 |
View Item |
