Continuous flash suppression (CFS) is one of the common methods to study unconscious visual processing. In the regular CFS paradigms used in previous studies, dynamic or high contrast image sequences (such as the Mondrian pattern sequences) are presented to one eye as masks. Meanwhile, a static or lower contrast target is presented to the opposite eye, which can be rendered invisible by the masks for a short period of time. The present study was designed to explore whether the CFS can effectively block the conscious processing of multiple moving targets. Inspired by the camouflage of chameleons in the nature, we proposed a novel CFS paradigm (which we call the “chameleon” paradigm). By using the alpha blending algorithm, we ensured the color of the targets to be consistent with the corresponding regions of the CFS masks at any moment. We then tested whether the “chameleon” paradigm can obscure the targets’ motion information from awareness more effectively than the regular CFS paradigm. We randomly recruited eight participants. Their dominant eyes were presented with the regular CFS masks, meanwhile the nondominant eyes were presented with ten spatially non-overlapping squares as the targets which moved either upwards or downwards at a constant velocity. Each square had one second of lifetime. Thus, for each square, after every one second of movement, its position was reset, and then it continued to move in the same direction at the same speed. In each trial, the target squares were presented for ten seconds (refreshing their positions ten times) at most. By manipulating the degree of color consistency between the targets and the masks, a total of four experimental conditions were included, with a “chameleon” condition and three control conditions. Participants were instructed to report the moving direction of the targets on seeing the targets by pressing a corresponding button. The program recorded both the response accuracy and the response time since the start of a trial (i.e. the time required for the targets to break into awareness, aka the breakthrough time). We also calculated the percentage of trials where the targets broke into awareness, which was called the breakthrough rate. The results showed that the “chameleon” paradigm allowed the CFS masks to efficiently block the conscious processing of multiple moving targets. Specifically, as compared to the three control conditions with less degree of color consistency between the targets and the CFS masks, the breakthrough rate was significantly lower under the “chameleon” condition where the color of the targets was fully consistent with the CFS masks. No significant differences were found for the breakthrough rate between the three control conditions. Moreover, according to the grand average data, in the “chameleon” condition the moving targets could break into awareness within 10 s in only about 25% of the trials. For the three control conditions, this probability increased to more than 80%, suggesting an overwhelming advantage of the “chameleon” paradigm in rendering multiple moving targets invisible. Another advantage of the “chameleon” paradigm is that it does not require the CFS masks to contain any motion information resembling the targets, thereby it ensures that the measurement of unconscious visual motion processing is exclusively from the target. Compared with the idea of modifying CFS masks in the literature, our method is believed to have broader applicability. Therefore, we recommend the “chameleon” paradigm a useful tool for future investigations of unconscious visual motion information processing.

随着系统可靠性的提高,高风险企业超过三分之二的事故原因涉及人的因素.员工不安全行为是系统失效的触发因素,潜藏的社会情境因素(如安全氛围)是"常驻的病原体",因此探索并改善影响安全行为的社会情境因素是有效提升组织安全的关键.在众多的情境因素中,安全氛围对安全绩效的积极影响已得到充分的文献支持,但对如何改善安全氛围的探索却有限.本项目围绕管理者对安全的承诺这一安全氛围的核心维度,基于信号理论提出直接安全管理行动是体现管理者安全承诺的重要途径,并在探索主管和经理关键安全管理行动对团队和组织安全氛围影响的基础上开展相应的干预研究.具体而言,在团队层面,探索改善主管关键安全管理行动对团队安全氛围提升的有效性;在组织和团队两个层面,探索改善经理的关键安全管理行动对同时提升组织和团队安全氛围的有效性.研究结果预期可以在安全管理实践中推广应用.

围家向然科学基金面上项目(72071200)。