Reassessment of the Miller Social Intimacy Scale: use with mixed- and same-sex dyads produces multidimensional structures.

The dimensional structure of the Miller Social Intimacy Scale has not been assessed. This investigation examined internal reliability and principal components of the scale for nonspousal same- and mixed-sex dyads with 149 male and 210 female undergraduate students. Analyses yielded high internal reliability over-all and unique multidimensional structures for each dyad type. This clarifies and enhances subsequent use of the scale for studying intimate friendship patterns which vary in sex composition.