Abstract
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.

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