Five Factor Machiavellianism: Validation of a New Measure.

Numerous scholars have criticized the traditional assessment of Machiavellianism due to insufficient construct coverage, some going so far as to question its distinctness from psychopathy. Tackling these issues, Collison, Vize, Miller, and Lynam developed the Five Factor Machiavellianism Inventory (FFMI), comprising antagonism, agency, and planfulness. We aimed to replicate the MACH-IV psychopathy relations, demonstrate the validity of the FFMI by assessing its relations with the NEO-PI-R and the HEXACO facets, and link the FFMI to a broad range of work-related criteria. We replicated the MACH-IV psychopathy relations and found a very high (rICCS = .91) absolute profile similarity between the FFMI's correlations with the NEO-PI-R in our sample (N = 572) and the correlation profile for the same variables reported by Collison and colleagues. Both the NEO-PI-R and HEXACO-PI-R profiles for the FFMI found in the current study supported its distinctiveness from traditional measures of Machiavellianism, which converged greatly with the correlation profiles for the FFMI-antagonism dimension. A cluster analysis also showed a substantial proportion of Five Factor Machiavellian individuals. In addition, the FFMI displayed positive relations with a broad range of criteria for vocational and work-related success and was clearly distinct from psychopathy.

Does it actually feel right? A replication attempt of the rounded price effect.

How does the roundedness of prices affect product evaluations? The 'rounded price effect' postulates that depending on the context, rounded or non-rounded prices increase the purchase likelihood of consumers. The study presented here is a replication attempt of these findings and the proposed mediation of the effect through a sense of 'feeling right' when evaluating the product. p-Curve analysis and the R-Index are used to assess the robustness of the originally reported statistics since original data were not available. A pre-registered replication of study 5 from the original article was conducted in a sample of N=588 participants. For both the original product and one alternative product neither an interaction between price roundedness and context, nor a mediation through 'a sense of feeling right' was found. Our results suggest that the effect is either smaller than originally reported or contingent on other, not investigated factors. Further studies might investigate contingencies in larger samples.