Students then describe what they observe as similar and what they observe as different.
The idea is for students to find a pattern of characteristics that distinguishes the examples from the non-examples. Students describe their thinking and share their strategies. After constructing a pattern for the common set of characteristics of the labeled examples, students then use their developed pattern to identify unlabeled samples as examples or non-examples. The process of comparing and contrasting information seems to help students retain concepts. The purpose of this study is to construct a concept attainment task using a HyperCard stack and videodisk images.