IPNB vs Lifespan Integration
A side-by-side comparison of recorded mechanisms, evidence review status, related condition topics, and philosophical roots.
At a glance
Source checks, condition-specific assessments and expert review are separate steps. Each assessment applies only to its stated population and use. Topic links do not establish comparative effectiveness.
IPNB
- Tradition
- Integrative
- Founder
- Daniel Siegel (1999)
- Review status
- Framework — unranked
- Focus
- Framework
- Format
- Individual
- Duration
- Framework
Lifespan Integration
- Tradition
- Trauma-Focused
- Founder
- Peggy Pace (2003)
- Review status
- Assessment not yet completed
- Focus
- Relational + Somatic + Integrative
- Format
- Individual
- Duration
- Medium-term (12-30 sessions typical)
How they work
IPNB
Core mechanism: Integration across neural networks (bilateral, vertical, temporal) through attuned relationship; expanding window of tolerance
Ontology: Impaired neural integration from relational/developmental experience; integration = mental health
Lifespan Integration
Core mechanism: Proposed: repeated chronological review of life memories gives the nervous system evidence that the danger is over and belongs to the past, shifting implicit body-level expectations about safety and self. The repetition, rather than the content of any single memory, is held to be the active ingredient. This is a clinical hypothesis. It has not been tested against a credible control, and LI's own literature does not settle what the timeline is doing.
Ontology: Fragmented temporal integration: the self is stuck in past time, experiencing old threat as present. The body has not updated its felt sense of when it is.
Related condition topics
These editorial cross-references organize reading. A shared link does not mean both approaches are effective, recommended, or interchangeable for that condition.
0 shared · 2 IPNB-only · 4 Lifespan Integration-only
Linked only in the IPNB entry
Linked only in the Lifespan Integration entry
What each assumes — and misses
IPNB
Philosophical roots: Siegel (interpersonal neurobiology); complexity theory (emergence, integration); Hebb (neurons that fire together); Bowlby (attachment shapes brain); Buddhism (mindfulness integration)
Blind spots: Framework too broad to test empirically; integration language can become vague; not a clinical method itself, and its most common misuse is neuroscience language standing in for relational engagement, since narrating a client's amygdala to them is not the same as being with them and the vocabulary is authoritative enough to make the substitution hard to notice
Therapeutic voice: Let's put a word on it before we go any further. Not the whole story, just the feeling. What's the closest word you've got?
Lifespan Integration
Philosophical roots: Siegel (interpersonal neurobiology: neural integration across time); van der Kolk (the body keeps the score: implicit memory); Schore (affect regulation and repair of early attachment); Bowlby (internal working models); Janet (dissociation as temporal fragmentation)
Blind spots: Limited controlled research base; mechanism of action not well understood neuroscientifically; can be over-applied to presentations that need more stabilization first; rapid pace of timeline repetitions may overwhelm some dissociative clients
Therapeutic voice: We're going to go through the timeline again. You don't have to say anything or make sense of it. Just notice each cue and let the next one come. If it starts to feel repetitive or like nothing much is happening, that's fine, keep going.
Choosing between them
IPNB (Integrative) and Lifespan Integration (Trauma-Focused) 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 IPNB and Lifespan Integration pages, or use the interactive comparison tool to add more modalities to this comparison.