Phenomenologically, human shape recognition appears to be invariant with changes of
orientation in depth (up to parts occlusion), position in the visual field, and size. Recent …

In certain simple rotations of objects, the orientation of the axis and planes of rotation can
determine whether people are able to visualize the motion or perceive it as simple and …

Despite decades of research, little is known about how people visually perceive object
shape. We hypothesize that a promising approach to shape perception is provided by a …

Shape constancy refers to the phenomenon in which the percept of the shape of a given
object remains constant despite changes in the shape of the object's retinal image. The …

The classification of a table as round rather than square, a car as a Mazda rather than a
Ford, a drill bit as 3/8-inch rather than 1/4-inch, and a face as Tom have all been regarded …

Participants viewed objects in the central visual field and then named either same or
different depth-orientation views of these objects presented briefly in the left or the right …

The" mental rotation" literature has studied how subjects determine whether two stimuli that
differ in orientation have the same handedness. This literature implies that subjects perform …

The research described in this chapter concerns the role of reference frames in perceiving
the shape and orientation of objects. Ultimately, I describe some experiments I have done to …

Visual object constancy is the ability to recognise an object from its image despite variation
in the image when the object is viewed from different angles. I describe research which …

When solid objects are viewed from only 1 direction, some parts are necessarily occluded.
Expectations about possible completions of novel objects (cubes with indentations) were …