LIST OF TABLES The staged self-directed learning model A comparison of assumptions of teacher-directed (pedagogical) learning and self-directed (andragogical) learning 40 2. Concrete Random. These learners display experimental attitudes and behaviors. Trial and error and intuitive approaches are preferred. 3. Abstract Sequential. These learners have decoding abilities with written, verbal, and image symbols. They prefer rational and sequential learning. 4. Abstract Random. These learners are attentive to human behavior. They prefer learning in an unstructured manner in discussions and activities that involve multisensory experiences. Gregorc developed the Gregorc Style Delineator to measure the two mediation traits, perception and ordering, from which abstractness and concreteness emerge (Gregorc, 1979). The author emphasizes the matching of instructional materials and methods to meet individual preferences. Campbell (1989), using Gregorc's (1979) delineation, pilot-tested 102 students in business communication at Memphis State University to study the relationship between teachers' and students' learning styles and students' achievement in business communication. Campbell discovered no significant difference (p<.05) in student achievement in a business communication course when categorized according to learning style. Likewise, no significant difference (p<.05) existed when learning style was matched to teaching style of the instructor.