"A tactual test of perception of raised outlines of forms was designed on the principle that such outlines can be presented in varying degrees of completeness and that the degree of completeness can be expressed in terms of the number of tactual stimuli of which the outline is composed and the distance between them. The power of this test to discriminate the performances of 24 brain-injured patients from a like number of normal adults was examined. Patients with brain injury were shown to require a greater degree of completeness of form outline than normals in order to recognize the form tactually." 21 references. (PsycINFO Database Record (c) 2006 APA, all rights reserved)