Implicit motive research has shown that implicit motives are important predictors of behavior and well-being. However, little is known about the interrelationship between the different implicit motives measures frequently applied. We aimed to shed light on the convergent validity of three implicit motive measures and wanted to test their assumed statistical independence from three explicit motive measures. Therefore, we administered the Picture Story Exercise (PSE), the Operant Motive Test (OMT), and the Multi-Motive Grid (MMG) in one and the same study. As explicit measures, we used the Personality Research Form, PRF, the Motive Enactment Test and a goal questionnaire. We investigated the statistical overlaps between all these measures (sample: 202 undergraduate students) and found that the implicit motive measures showed either no or only little correlation with each other. Furthermore, they also partly correlated with explicit motive measures. Supplementary analyses showed that the lack of statistical overlap between PSE and OMT can partly be ascribed to their different scoring systems.