Absorption, a correlate of hypnotizability, is conceptually related to openness to experience. Study 1 found no evidence that gender moderated the correlation between absorption and hypnotizability, or of nonlinear trends. Study 2 showed that openness was factorially complex, and that absorption was related to imaginative involvement, but not to social-political liberalism. Study 3 found small quadratic trends in the relations between these variables and hypnotizability; hypnotizability was related to imaginative involvement, but not liberalism. Study 4 confirmed differential correlations between absorption subscales and hypnotizability but failed to confirm the nonlinear trends. Implications for future studies of the correlates of hypnotizability, and for the nature of the "fifth factor" in personality structure, are discussed.