Child-Parent Psychotherapy vs Circle of Security
A side-by-side comparison: mechanism, evidence, the conditions each treats, philosophical roots, and where they actually disagree clinically.
At a glance
Child-Parent Psychotherapy
- Tradition
- Attachment
- Founder
- Alicia Lieberman (1995)
- Evidence
- Guideline-recommended
- Focus
- Dyadic + Attachment
- Format
- Parent-child dyad
- Duration
- Medium (50 sessions)
Circle of Security
- Tradition
- Family Systems
- Founder
- Glen Cooper / Kent Hoffman / Bert Powell (1998)
- Evidence
- Guideline-recommended
- Focus
- Relational + Attachment
- Format
- Group (COS-P) or individual (COS-Home Visiting)
- Duration
- Short (8-20 weeks depending on protocol)
How they work
Child-Parent Psychotherapy
Core mechanism: Within the safety of the therapeutic relationship, the therapist helps the parent recognize how their own history (ghosts) distorts perception of the child, while strengthening protective relational patterns (angels) — healing happens in the dyad
Ontology: Young children's trauma symptoms are inseparable from the caregiving relationship — the dyad, not the individual child, is the unit of treatment; parental ghosts perpetuate intergenerational transmission
Circle of Security
Core mechanism: Helping caregivers recognize and regulate their own triggered defensive responses (shark music) so they can remain present to their child's actual attachment needs on the Circle of Security — providing safe haven when the child needs comfort and secure base when the child needs to explore
Ontology: Child security develops through repeated experience of a caregiver who is bigger, stronger, wiser, and kind — present enough to provide safe haven and secure base, and capable of reflecting on their own triggered responses without being controlled by them.
Conditions treated
2 shared · 3 Child-Parent Psychotherapy-only · 2 Circle of Security-only
Both treat
Only Child-Parent Psychotherapy
Only Circle of Security
What each assumes — and misses
Child-Parent Psychotherapy
Philosophical roots: Bowlby (attachment as survival system); Fraiberg (ghosts in the nursery — the founding metaphor); Winnicott (good-enough mothering, holding environment); object relations; Stern (intersubjective world of the infant)
Blind spots: Requires engaged caregiver — inaccessible when caregiver is perpetrator and unavailable; 50-session protocol is resource-intensive; limited to ages 0-5
Therapeutic voice: When he clings to you like that, what does it remind you of from your own childhood?
Circle of Security
Philosophical roots: Bowlby (attachment theory, safe haven and secure base); Ainsworth (Strange Situation, attachment patterns); Main (Adult Attachment Interview, reflective function); Winnicott (good enough mothering); Stern (attunement, intersubjectivity)
Blind spots: COS-P group protocol relies on DVD-based delivery which limits individualization; home visiting version requires significant training and supervision; not appropriate for active child abuse situations without additional safety planning; caregiver's own attachment trauma may require individual therapy beyond what COS provides
Therapeutic voice: When your child reached for you just then and you pulled back — what were you feeling in that moment? Not what you thought. What you felt.
Choosing between them
Child-Parent Psychotherapy (Attachment) and Circle of Security (Family Systems) come from different traditions, which means they assume different things about what a person is, what causes suffering, and what the therapeutic relationship is for. The choice between them is often less about "which works better" and more about which set of assumptions fits the client and the therapist.
For deeper coverage: see the full Child-Parent Psychotherapy and Circle of Security pages, or use the interactive comparison tool to add more modalities to this comparison.