Graeme J. Taylor, Piero Porcelli, R. Michael Bagby

Key words: alexithymia, attention-appraisal model, attachment, emotion and imagination, emotion regulation, trauma

Objective: Our goal was to compare the original conceptualization of the alexithymia construct with the attention-appraisal model, focusing primarily on the removal of the reduced imaginal activity component, a seminal aspect of the construct in the original model. We also examined associations between alexithymia and emotional distress and emotion regulation, attachment, and trauma, and whether alexithymia is a transdiagnostic risk factor. We discuss differences between the models in the treatment of alexithymia and also differences in measurement.
Method: We conducted a narrative review of the scientific literature validating the original model of alexithymia and examined the comparatively few empirical studies evaluating the attention-appraisal model. Articles describing contemporary theoretical ideas about the relationship between imagination and emotion were reviewed, as well as studies exploring associations between alexithymia and imaginal activity.
Results: The attention-appraisal model of alexithymia is theoretically derived and examined empirically in studies using correlation/measurement-based methods that employed self-report measures with mostly non-clinical samples and conducted primarily by researchers led by developers of the model. The original model of alexithymia is derived from observations of patients in clinical settings; its validity is supported by findings from hundreds of empirical investigations spanning nearly four decades with nonclinical and a variety of clinical samples using both correlation-based and experimental studies and methods of measurement other than self-report, and by independent teams of researchers. The reduced imaginal activity component of the alexithymia construct is mostly supported by these studies.
Conclusions: Because of the dearth of studies with clinical samples, the absence of investigations by independent researchers, and the limited range of methods and measurements to evaluate and assess the model, there is insufficient evidence to warrant removal of the imaginal activity component of the alexithymia construct and for replacing the original conceptualization of the construct with the attention-appraisal model.