Discipline: Mathematics
The objective of this paper is to find out if there is a significant relationship between critical thinking and achievement in learning the basic probability concepts, and between critical thinking and the attitudes toward learning this topic. If there is a significant relation, then the aspect of critical thinking could be identified and improved so that the students would be able to improve their achievement. The research instruments were the standardized Watson-Glaser Critical Thinking Appraisal, a constructed attitude inventory, and a teacher made multiple choice tests to measure achievement. The teacher could use the results of Watson Glaser Critical Thinking Appraisal to plan out daily lessons involving techniques in questioning and the types of question given in the quizzes and long tests. The results of the study show that the variables correlated significantly with attitude at the .05 level of significance are inference, recognition of
assumption, deduction, interpretation, evaluation of arguments and the critical thinking total score. Significantly correlated with achievement are inference, recognition of assumption, deduction, evaluation of arguments, and the critical thinking total score. Critical thinking and attitude are predictors of achievement.