Coherence of plaids comprising components of disparate spatial frequencies.
The limits of plaid coherence were measured in terms of the maximum spatial frequency difference between the components at which coherence is sustained, for a variety of contrasts and speeds. In some circumstances the maximum spatial frequency difference is between three and four octaves. This suggests that one-dimensional components of a moving image are not combined within spatial frequency channels to give overall pattern direction but that there is a pooling of information across spatial frequencies prior to the stage at which pattern direction is computed. Coherence range declines as contrast is decreased or drift speed is increased.
Smith
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AT
School of Psychology, University of Wales College of Cardiff.
D015350:Contrast Sensitivity / Q000502:physiology*; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D013997:Time Factors