Abstract
This study compared the effectiveness of different types of instructional aids for improving learner performance in an introductory statistics course. Two types of instructional aids were examined: an expert system program (ES), and a computer-assisted instructional program (CAI). Subjects for this study were 133 students selected from a required undergraduate introductory statistics course at a large state university. Students with high and low prior levels of statistics achievement were randomly assigned to three treatment groups: 1) an ES as an adjunct to lectures, 2) a CAI as an adjunct to lectures, and 3) a control group with lectures alone. At the conclusion of the study students were tested on a Statistics Achievement Test. Students that had utilized the ES and the CAI teaching aids scored significantly higher than students from the lecture group alone. There were no significant differences between the ES and the CAI groups. The results of the study indicate that computer-based programs can help students learn and improve their performance. Technological advances in the field of computer-based learning programs provide promising opportunities for improving learner performance.
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