10 FIRO-B intercorrelation matrices were factor analysed; one matrix was derived from new FIRO-B data, all the other matrices were found in the literature. The correlation matrices were also subjected to meta-analysis. The findings suggested that the four FIRO-B scales associated with Inclusion and Affection are facets of the ubiquitous interpersonal superfactor, Nurturance, but the two FIRO-B Control scales each express an orthogonal construct both of which relate to the super-factor, Dominance.