Automated Measurement of Head Movement Synchrony during Dyadic Depression Severity Interviews

Area of Science:

• Psychology
• Clinical Psychology
• Psychotherapy Research

Background:

• Automated depression assessment research typically overlooks therapist behavior.
• Interpersonal dynamics in therapy, such as head movement synchrony, are understudied.
• Understanding patient-therapist interaction is crucial for effective depression treatment.

Purpose of the Study:

• To investigate the interpersonal coordination (synchrony) of head movements during clinical interviews with patients diagnosed with major depressive disorder.
• To analyze how head movement synchrony changes over the course of a 21-week treatment period.
• To explore the relationship between head movement synchrony and depression severity.

Main Methods:

• Tracking 3D head movement (pitch and yaw) of patients and therapists during clinical interviews.
• Measuring interpersonal coordination using windowed cross-correlation and peak picking algorithms.
• Analyzing changes in head movement synchrony over time using hierarchical linear modeling (HLM).

Main Results:

• A significant effect of patient-therapist head movement synchrony was observed.
• Within-dyad variability in head movement coordination exceeded between-dyad variability.
• Head movement synchrony did not significantly change with improvements in depression severity over the 21-week treatment period.

Conclusions:

• Patient-therapist head movement synchrony is a notable aspect of clinical interaction.
• Head movement coordination patterns within a dyad are more variable than differences between dyads.
• This study is the first to analyze the mutual influence of patient-therapist head movement in relation to depression severity.