Several studies have supported the original five factor structure of the SDQ in both clinical and epidemiological samples [15, 20, 30, 32, 45 — 47], others have raised questions about
the structural validity of this model.
Convergent
validity results further suggest the MCC's distinctiveness regarding other measures
of commitment, by showing personal, but not moral or
structural, commitment, to correlate with the Investment
Model Scale (Rusbult et al. in Personal Relationships 5:357 — 387, 1998), defining commitment as a unitary construct pertaining a general long - term orientation and intent to persist in the relationship, and psychological attachment towards the partner.