This study investigated the attention or arousal of above and below average boys and girls while viewing a science television program on videotape. Skin resistance (GSR) was measured by a biosensor attached to a microcomputer and served as the dependent variable. Analysis of the data included a 2x2x8 ANOVA of gender v. ability v. GSR. The significant three-way interaction indicates that low-ability girls had the lowest GSR measures and inferentially that they were the least attentive to the videotape. High ability boys and girls, and low ability boys produced equal GSR measures. These results suggest that a low cost GSR biosensor may be useful to science education researchers with an additional measure of attention or arousal. (Author/CW)