A unified model of illusory and occluded contour interpolation.

Models of contour interpolation have been proposed for illusory contour interpolation but seldom for interpolation of occluded contours. The identity hypothesis (Kellman & Loukides, 1987; Kellman & Shipley, 1991) posits that an early interpolation mechanism is shared by interpolated contours that are ultimately perceived as either illusory or occluded. Here we propose a model of such a unified interpolation mechanism for illusory and occluded contours, building on the framework established in Heitger, von der Heydt, Peterhans, Rosenthaler, and Kubler (1998).

Superadditive memory strength for item and source recognition: the role of hierarchical relational binding in the medial temporal lobe.

Source memory depends on our ability to recollect contextual information--such as the time, place, feelings, and thoughts associated with a past event. It is acknowledged that the medial temporal lobe (MTL) plays a critical role in binding such episodic features. Yet, controversy exists over the nature of MTL binding--whether it contributes specifically to source recollection or whether it contributes equally to both item familiarity and source recollection.

Aesthetic issues in spatial composition: effects of position and direction on framing single objects.

Artists who work in two-dimensional visual media regularly face the problem of how to compose their subjects in aesthetically pleasing ways within a surrounding rectangular frame. We performed psychophysical investigations of viewers' aesthetic preferences for the position and facing direction of single, directed objects (e.g.

Toward specifying the nature of the relationship between expressed emotion and schizophrenic relapse: the utility of curvilinear models.

Although expressed emotion (EE) has been demonstrated to be associated with the course of schizophrenia, the nature of this relationship is unclear. This study proposes that testing for curvilinear relationships can identify the specific nature of the relationships between EE indices and relapse. The utility of curvilinear models was explored through a reanalysis of data from a prior study of EE among Mexican-Americans (Karno et al.