Houston, TX 77005
10:00 a.m. Monday, Oct. 21, 2013
On Campus | Alumni
What exactly are the "parts" that make up a whole object, and how and when do they group? The answer that is proposed hinges on Emergent Features: features that materialize from the configuration and that make the object more discriminable from other objects. EFs are not possessed by any individual part and are processed as or more quickly than are the properties of the parts. The present experiments focus on visual discrimination of two-line configurations in an odd-quadrant task. Stimuli will be created so as to isolate each EF in order to measure its contribution to speed of discrimination. Previous results suggest that the EFs most responsible for the variations in RT might be lateral endpoint offset, intersections, parallelism, connectivity, terminator count, pixel count, closure, and inside/outside relationship. The present study seeks to: 1. show support that each of these EFs makes a contribution to visual discrimination when isolated experimentally, 2. rank order these EFs in terms of their salience, and 3. measure EF contributions on an interval scale using the subtraction method.