In a study that investigated the predictive validity of a self-directed learning readiness scale (SDLRS), scores received by 63 first year nursing students on this scale were compared to alternate measures of self-directedness. These measures included nominations as self-directed learners by peers and faculty; entry grades from high school; and grades received at the end of the first year nursing program in five subjects. Results showed a significant correlation between SDLRS scores and peer nomination scores and between SDLRS scores and first year final subject grades. While these correlations were statistically significant, they explained only 7% and 8% of the variance thus not reaching an educationally meaningful level. Limitations of the alternate measures as a substitution for a "gold standard" are discussed.