A synthesis is presented of the work of Lindblom and Cohen, MacDonald and Walker, and the current authors. The synthesis considers issues in the usefulness of social science theory and research, and how observer roles in qualitative field studies yield multiple kinds of usable knowledge to a variety of audiences. (Author/BW)

Traces music's role in the development of motion pictures and discusses ways for instructional designers to increase the effectiveness of productions through using music. Studies showing that tempo, modality, rhythm, and harmony interact with audience characteristics to determine affective responses to media are reviewed. Extensive references are…

Lines are elemental design devices that provide the primary structure for visual expressions in printed media. Gestalt principles of perception emphasize the role of the viewer, so the energy of the lines and the commercial viability of a particular design depend upon the designer's and photojournalist's understanding of both the viewer's…