They also reexamine the smaller set of studies involving surveys of authors as to the reasons for their behavior. Choosing the two most highly cited authors appearing in both of two recent studies of the Communication literature all citations to their work in the years 1995 and 1996 were collected. 133 unique citers were identified and sent 32 item questionnaires with the questions from a recent study in the Psychology literature. No new reasons for citation were identified. The top reasons were a review of past work, acting as a representative of a genre of studies, and as a source of a method.
Negative citation is quite rare.
Twenty five not redundant items with some indication of importance were subjected to a factor analysis. The teacher provided ratings of the children's topic knowledge, general science knowledge, and reading ability. Lotus ScreenCam was used to record 18 of the student system interactions. Weighted effectiveness and efficiency scores are then computed. Thirty six percent initially browsed subject categories while the rest entered single or multi-word concepts.