Samenvatting

The purpose of this study is to investigate if the questionnaires CT-HK and CriTT are valid for measuring critical thinking. The skill critical thinking is one of the aspects tutors of Saxion University of Applied Science and Tomsk State University are looking at for the students on the study program Applied Psychology. Over the years the CT-HK and CriTT are used for research about the critical thinking skills owned by students and on which critical thinking skills there can be improvement.  There is a lack on the reliability and validity research on the two toolkits. Some studies showed a good reliability of the CT-HK. The CriTT have been used several times for researches but the reliability remained unwritten in many papers.