Adapting text presentations to media attributes: Getting more out of less in CBI

摘要

This paper summarizes three research studies on text and screen density variables in a CBI lesson. The first two studies investigated the effectiveness of low-density text as an alternative to conventional formats on expository lessons taught in print and CBI modes. Results were supportive by indicating significant time savings without accompanying decreases in performance. The third study examined learner preferences for four different screen densities using high-density text. The important findings indicated preference for formats that maintained a reasonable balance between the amount of text per screen and the number of lesson frames. Implications are given for application and further research using text and screen density as variables for CBI screen design, learner control, and adaptive instructions.