Difficulty and familiarity norms for 192 single solution word fragments

Supplied normative data for the probability of successfully completing 192 single-solution word fragments. Normative data on the familiarity of 80 college students with the solution words were obtained, using ratings, as were estimates of word frequency from existing norms. Regression analyses were performed to predict fragment completion difficulty from familiarity, frequency, and structural characteristics of the fragments. Familiarity, whether or not first and/or last letters appeared in the fragment, and the ratio of letters to missing letters in the fragment were included in the regression equation as significant predictors of difficulty for this fragment set.