Narcissism, which is broadly defined as a grandiose sense of self-importance (Judge, LePine, & Rich, 2006), is a construct that is associated with many potentially toxic traits and behaviors (Back, Schmukle, & Egloff, 2010; Hogan, Raskin, & Fazzini, 1990; Paulhus & Williams, 2002). Recently, interest in determining the effects of narcissism in organizations has increased (e.g. Blair, Hoffman, & Helland, 2008; Chatterjee & Hambrick, 2007; Judge et al., 2006; Penney & Spector, 2002). Psychometric issues with the Narcissistic Personality Inventory (NPI; Raskin & Hall 1979, 1981) and other measures of narcissism necessitate a more robust measure that can more accurately capture the facets of a complex construct. Conditional Reasoning Tests are designed to indirectly measure implicit cognitive processes (James & LeBreton, 2011), and are especially useful in measuring "socially unacceptable" traits such as narcissism. A 20-item Conditional Reasoning Test for Narcissism (CRT-NR) was created and underwent preliminary validation testing. Results support a 15-item measure to be used in continued validation of the instrument.