On the lawfulness of grouping by proximity

Article Abstract:

Data from a study conducted by M. Kubovy and J. Wagemans were used to quantify grouping strength and to evaluate the influence of configuration on the lawfulness of grouping by proximity. The analysis demonstrated that the relative effectiveness of grouping into strips of dots of a specific configuration corresponded to a decreasing exponential relationship of the relative distance between the dots in the configuration considered. On the other hand, the configural characteristics, such as the symmetry of the dot pattern, were not determinants of the lawfulness.

Visual pathways, Visual pathway

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The visual system's measurement of invariants need not itself be invariant

Article Abstract:

The effects of parametric differences on the visual system's measurement of invariants fail to always give evidence for the use of mental transformations and against the use of invariants by the visual system. A study of estimation of the affine-invariant coordinates of a point, located within an affine reference frame, shows that the visual system's measurement of invariants can vary. Characteristics of configurations related to affine deformation parameters affect accuracy of measurement.

Invariants, Invariants (Mathematics)

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Grouping by proximity and multistability in dot lattices: a quantitative gestalt theory

Article Abstract:

A theory is proposed to predict the possibility of grouping by proximity of all the six dot lattices and the entropy of the unstable perceptual organization. The force that attracts the dots to each other's neighborhood shows an exponential decay behavior that declines with time, but the attraction constant did not show much variation. This model fits the data exceedingly well and the ambiguity of the structures is well explained.

Models, Analysis, Evaluation, Perception, Perception (Psychology), Lattice theory

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