Object substitution masking and the object updating hypothesis
This design also eliminates the opportunity for decision-biases to influence the results.The results show that predictable motion has a strong positive influence on target shape discrimination, to the extent that it makes a backward-masked target even more visible than when it appears in isolation.The upshot is that in contrast to the results for discrimination, target detection is influenced little by these factors.Experiments 4 and 5 examine the discrimination of a fine shape detail of the target, in contrast to the crude discrimination of target orientation in Experiments 1 and 2.
Because of motion blur and masking, for instance, one could reasonably predict that it should be more difficult to perceive a stimulus which is part of an object in motion as opposed to a static stimulus of similar duration and spatial extent.
The results show that both factors influence target discriminability in an additive way, suggesting that the processes of prediction and postdiction have independent influences on visibility.
Experiment 3 examines the same display sequences with a different psychophysical task (i.e., detection) in an effort to reconcile the present findings with previous contradictory results.
In the present paper, we will examine how visual identification and detection can be sometimes impaired and at other times enhanced by the relations between stimuli making up an object in an apparent motion sequence.
Functional brain imaging studies provide hints that the illusory motion token during apparent motion may be represented by activity in the primary visual cortical (V1) areas to which the token’s spatial position retinotopically corresponds.