Validity and reliability of electroencephalographic frontal alpha asymmetry and frontal midline theta as biomarkers for depression

Electroencephalographic (EEG) frontal alpha asymmetry (FAA) and frontal midline (FM) theta have been suggested as biomarkers for depression and anxiety, but have mostly been assessed in small and non‐clinical studies. In a clinical sample of 79 adults with depression (ICD‐10: F32), resting EEG and scales of depression (MADRS) and anxiety (HADS‐A) were measured at intake and after 3 months. FAA and FM theta values were referenced to a normative population database. Internal consistency, test‐retest reliability, and correlations with psychiatric tests were examined. Reliability was sufficient. However, FAA and FM theta values were close to the general population, and correlations with psychiatric tests were mostly small and non‐significant, with the exception of FAA on F7–F8 z‐scores and HADS‐A. We conclude that the validity of FAA and FM theta and therefore their potential as biomarkers for depression and anxiety remain unclear.     

Couples Therapy Using the Technique of Construct Differentiation

A central problem in couples therapy is the clients' tendency to persist in endless and fruitless alternation between attacking the partner and justifying themselves. The technique of construct differentiation described in this article has proved helpful in coping with this situation. In three clearly structured steps, the therapist explores the personal constructs of each partner in the presence of the other. Instead of concentrating in the usual way on circularity of thoughts, feelings, and behavior, the partners are hindered from interacting and are confronted by the therapist's questions concerning their own inner process, independently of that of the partner. By becoming aware of their own ambivalent constructs and those of the partner, the eagerness to convert the partner to their own point of view can be reduced, and the construct system of each partner can be enriched by the other's constructs. Construct differentiation proves especially useful in the treatment of power struggles and narcissistic collusions.     

Being better by being right: subjective group dynamics and derogation of in-group deviants when generic norms are undermined

The authors predicted that derogation of group deviants depends on the extent to which in-group norms or values are validated or undermined in a social context. In Experiment 1 participants were less tolerant and derogated in-group deviants more when other in-group members opposed the norm. In Experiment 2 participants derogated in-group deviants more than out-group deviants and than noncategorized individuals, but only when normative in-group members lacked uniformity. In Experiment 3 participants derogated in-group deviants more when there was uncertainty about in-group superiority. These results are consistent with previous research on the black sheep effect (J. M. Marques, V. Y. Yzerbyt, & J. -P. Leyens, 1988) and with the model of subjective group dynamics (D. Abrams, J. M. Marques, N. J. Bown, & M. Henson, 2000; J. M. Marques, D. Abrams, D. Paez, & C. Martinez-Taboada, 1998).