The Learning Style Profile (LSP), developed in four phases from the fall of 1983 to early 1986, identifies perceptual responses, cognitive skills, study preferences, and instructional preferences. This study assesses the LSP Simultaneous Processing Skill subscale, which is modeled after the work of the Russian neuropsychologist, A. R. Luria. Simultaneous processing is the integration of separate elements into a whole. Its essential characteristic is that an entire system is grasped at once. Initial development of the subscale involved selection of six gestalt closure items from a set of 50 developed by C. M. Mooney (1956). Various combinations of items in sets of six were administered to successive groups of elementary and secondary school students, and a subscale of five items was finally retained. In general, factor analysis demonstrated poor reliability, and the Mooney items were dropped. Thirteen new simultaneous subscale items were prepared from computer-generated abstract forms created on a five-pen, programmed plotter. Items were also adapted from three simultaneous subscales of the Kaufman Assessment Battery for Children to serve as a standard measures to evaluate the trial items. Factor analysis of results of administration of the subscale to 1,545 high school students indicated that the reliability and consistency of the subscale are excellent. Two sample test items and one data table are included. (TJH)