Measuring Machiavellianism with Mach V: a psychometric investigation

This study re-examines the reliability of the Mach V Scale using two different scoring procedures: Christie's scoring system and an alternative scoring system by Rogers and Semin. Using commonly accepted standards, results for 123 business managers indicate that the Mach V Scale is not a reliable instrument. Regardless of the scoring Scheme or the method of assessment employed, reliability estimates found in this study are well below conventionally accepted criteria and are also well below reliability estimates previously reported in the literature. In addition, the investigation indicates that although the alternative scoring system appears to increase the precision of the Mach V Scale, the effect of this increase is negligible in hypothesis testing.