This report describes the experimental studies conducted to examine the role of mental structures in four different areas of research. The first area involves the structural analysis of isolable subsystems involved in visual and auditory pattern recognition. The second area involves the study of the encoding and retrieval of emotional or evaluative information. The study of complex patterns of active and passive production of voluntary movements constitutes the third field of investigation. The fourth area cuts across work in the other three and deals with distinctions between automatic processing and processing which is under active attentional control. Experiments in these areas are designed to examine the relationship between mental structures in general and the brain systems which subserve the functions of consciousness. The final part of the report deals briefly with efforts to make these findings on mental structure available in the form of course materials. (Author)