Perceptual organization of moving stimuli modulates the flash-lag effect

When a visual stimulus is flashed at a given location the moment a second moving stimulus arrives at the same location, observers report the flashed stimulus as spatially lagging behind the moving stimulus (the flash-lag effect). The authors investigated whether the global configuration (perceptual organization) of the moving stimulus influences the magnitude of the flash-lag effect. The results indicate that a flash presented near the leading portion of a moving stimulus lags significantly more than a flash presented near the trailing portion. This result also holds for objects consisting of several elements that group to form a unitary percept of an object in motion. The present study demonstrates a novel interaction between the global configuration of moving objects and the representation of their spatial position and may provide a new and useful tool for the study of perceptual organization.     

‘I do not cognize myself through being conscious of myself as thinking’: Self-knowledge and the irreducibility of self-objectification in Kant

ABSTRACT

The paper argues that Kant’s distinction between pure and empirical apperception cannot be interpreted as distinguishing two self-standing types of self-knowledge. For Kant, empirical and pure apperception need to co-operate to yield substantive self-knowledge. What makes Kant’s account interesting is his acknowledgment that there is a deep tension between the way I become conscious of myself as subject through pure apperception and the way I am given to myself as an object of inner sense. This tension remains problematic in the realm of theoretical cognition but can be put to work and made productive in terms of practical self-knowledge.