Information drawn from research conducted in a comparative study between middle and high school students is presented. The study was designed to investigate the difference in the analysis of absolute and relativistic generalizations. Data from this research indicate that differences do exist between middle and high school students in this area of absolute and relativistic thinking. In their reactions to absolute statements provided for analysis, high school students tended to show greater uncertainty in agreement than middle school students. On the relativistic statements, middle school students tended to show greater uncertainty than high school students. Middle school students, when confronted with both relativistic and absolute statements, show more uncertainty in agreement on the relativistic statements. As a result of these findings, implications are noted and recommendations are made which are intended to provide guidance for conducting instruction related to the enhancement of critical thinking skills in this area. (Author/JD)