Resources Consolidated below are some theories and models we found to be useful in our work with the single parent clientele. Single Parent Life Cycle Theory read more Attachment Theory read more cognitive Behavioural Therapy read more Dual Process Model read more Social Cognitive Theory read more Person-Centred Approach read more Solution-Focused Brief Therapy read more Psychosocial Theory8 Stages of Human Development read more Motivational Interviewing read more Brief Strategic Therapy read more