The aim of this thesis was to develop a measurement tool that can be examined with the time management of students. The Würzburger Zeitmanagementinventar (WZI), developed by Oberst 2008, served as a base for adaptations. Since the Error Orientation Questionnaire for Students (EOQ_Stud) ? developed by Baumann (2012) ? was important for this thesis, the EOQ_Stud was rechecked with a retest for its reliability. This master thesis is thus a follow work to that of Baumann (2012).To validate the WZI_Stud, the two theoretical constructs error orientation and self-regulation were chosen firstly by the EOQ_Stud and secondly by the Short Self-Regulation Questionnaire (SSRQ).The sample was elected as in the work of Baumann (2012). It was shown that the WZI_Stud is an appropriate measurement instrument that fits the scientific quality criteria, as the scientific quality criteria are fulfilled, and that the EOQ_Stud is reliable, which means that the feature error orientation is measured reliable.After the analysis of the means of item, some items were excluded. A re-analysis showed that the item difficulties of the scales were between .36 and .73, respectively .47 and .73. The separation efficiencies were between .39 and .61 and between .45 and .77, the Cronbach's alpha coefficients were between.76 and .93. The characteristics of the items were given satisfactorily. Correlations between the scales showed significant correlations (r = .16, p <.05) ? precisely those were detected in terms of construct validity with questionnaires for error orientation and self-regulation. The test-retest reliability of the EOQ_Stud showed highly significant but low correlations between the measurement points, but could be strengthened on the basis of the comparison of means in terms of symptomattenuation.