The importance of affect regulation, modulation or integration for higher-order reflection and adequate functioning is increasingly emphasized across different therapeutic approaches and theories of change. These processes are probably central to any psychotherapeutic endeavor, whether explicitly conceptualized or not, and in recent years a number of therapeutic approaches have been developed that explicitly target them as a primary area of change. However, there still is important lack of clarity in the field regarding the understanding and operationalization of affect integration, particularly when it comes to specifying underlying mechanisms, the significance of different affect states, and the establishment of operational criteria for measurement. The conceptual relationship between affect integration and reflective function thus remains ambiguous. The present article addresses these topics, indicating ways in which a more complex and exhaustive understanding of integration of affect, cognition and behavior can be attained.

Findings from previous psychotherapy research suggest that the majority of improvement takes place in the initial phase of treatment with the relative effectiveness dropping at a negatively accelerating rate. However, the evidence for this pattern of change comes from investigations of short-term treatments and it is unclear whether this also holds for more flexible and long-term psychotherapy. We provided open-ended treatments under routine-care conditions for a representative sample of 362 patients, including a large proportion characterized by severe psychopathology. Patients attended 52 sessions on average (SD = 59, range = 1-364, Mdn = 36). Our results indicated that the degree of improvement was linearly associated with time spent in psychotherapy and contingent upon the severity of psychological problems at intake. The least severely afflicted received the shortest treatments, experienced the most rapid change but demonstrated smaller overall magnitudes of improvement. More severely suffering patients received longer treatments, had slower rates of change but in general received greater overall benefits. We argue that previous suggestions of psychotherapy dosage have been less appropriate for patients suffering from moderate to severe psychopathology.

The present study investigated the relationship between baseline levels of affect integration and the magnitude of change during and after open-ended psychotherapy. Affect integration reflects the capacity for accessing and utilizing the adaptive properties of affects for personal adjustment, along with the more general capability of tolerating and regulating affective activation. It is thus a capacity with relevance for the postulated mechanisms of change in various treatment modalities. Overall, the results indicated that patients with more severe problems in affect integration had larger improvements in symptoms, interpersonal and personality problems in open-ended treatment than those with less severe problems. This was also the case when examining the predictive effects of the integration of specific affects on changes in interpersonal relatedness. It was indicated that increasing problems with the integration of discrete affects were associated with distinct patterns of change in different interpersonal problem domains.

Affect integration, or the capacity to utilize the motivational and signal properties of affect for personal adjustment, is assumed to be an important aspect of psychological health and functioning. Affect integration has been operationalized through the affect consciousness (AC) construct as degrees of awareness, tolerance, nonverbal expression, and conceptual expression of nine discrete affects. A semistructured Affect Consciousness Interview (ACI) and separate Affect Consciousness Scales (ACSs) have been developed to specifically assess these aspects of affect integration. This study explored the construct validity of AC in a Norwegian clinical sample including estimates of reliability and assessment of structure by factor analyses. External validity issues were addressed by examining the relationships between scores on the ACSs and self-rated symptom- and interpersonal problem measures as well as independent, observer-based ratings of personality disorder criteria and the Global Assessment of Functioning (GAF) scale from the Diagnostic and Statistical Manual of Mental Disorders (4th ed. [DSM–IV]; American Psychiatric Association, 1994).