Biological motion gains preferential access to awareness during continuous flash suppression: Local biological motion matters.

Abstract

Humans have developed excellent capabilities for the detection of biological motion (BM) that facilitate survival and interpersonal interactions. However, whether and how such capabilities allow BM to access our awareness remain unanswered questions. Therefore, this study aimed to explore these questions across four experiments that relied on the breaking continuous flash suppression paradigm (b-CFS). We found that intact BM, which consists of both global-configuration and local BM information, gained preferential access to awareness compared with inverted BM and non-BM (Experiment 1). Subsequently, we tested two opposing hypotheses regarding factors that modulate the prioritized effect: (a) the global-precedence hypothesis (global configuration plays a major role in BM's preferential access) and (b) the local-precedence hypothesis (local BM information plays a major role in BM's preferential access). The results showed that scrambled BM consisting of only local BM information-but not limited-lifetime BM consisting of global-configuration information and disrupted local BM information-had the same conscious accessibility level as intact BM (Experiment 2). Moreover, scrambled BM-but not limited-lifetime BM-had preferential access to awareness compared with non-BM (Experiment 3). Furthermore, using a reverse-correlation method, we showed that the conscious accessibility of local BM was not governed by a priori body structure (Experiment 4). This study provides substantial evidence that BM gains preferential access to awareness during b-CFS. Moreover, local BM information rather than global configuration plays a major role in conscious accessibility. These findings support the local-precedence hypothesis and suggest that local BM information can serve as a "life detector" in the visual system. (PsycInfo Database Record (c) 2022 APA, all rights reserved).