Development and Validity of Problems with Contradictory Information and no Specified Universal Set to Measure the Truth-Seeking of Pre-Service Mathematics Teachers

Truth-seeking is a predictor of whether pre-service mathematics teachers have critical thinking dispositions. The effort to familiarize the truth-seeking of pre-service mathematics teachers is realized by giving the problems with contradictory information and the problems with no specified universal set continuously. The aim is to develop the problems that can measure the truth-seeking of pre-service mathematics teachers. The participants were 184 mathematics education students from six universities in Indonesia. The development steps used were define, design, and develop. Data were analyzed by using item response theory. The findings and conclusions were reached and the results indicated that problems were developed are valid to measure the truth-seeking of pre-service mathematics teachers.