The Difficulties in Emotion Regulation Scale (DERS) is a widely-used, theoretically-driven, and psychometrically-sound self-report measure of emotion regulation difficulties. However, at 36-items, the DERS may be challenging to administer in some situations or settings (e.g., in the course of patient care or large-scale epidemiological studies). Consequently, there is a need a briefer version of the DERS. The goal of the present studies was to develop and evaluate a 16-item version of the DERS – the DERS-16. The reliability and validity of the DERS-16 were examined in a clinical sample (N = 96) and two large community samples (Ns = 102 and 482). The validity of the DERS-16 was evaluated comparing the relative strength of the association of the two versions of the DERS with measures of emotion regulation and related constructs, psychopathology, and clinically-relevant behaviors theorized to stem from emotion regulation deficits. Results demonstrate that the DERS-16 has retained excellent internal consistency, good test-retest reliability, and good convergent and discriminant validity. Further, the DERS-16 showed minimal differences in its convergent and discriminant validity with relevant measures when compared to the original DERS. In conclusion, the DERS-16 offers a valid and brief method for the assessment of overall emotion regulation difficulties.

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Deliberate self-harm was studied in 14-year-old adolescents from four schools in southern Sweden with a test-retest design, using a nine-item version of the Deliberate Self-Harm Inventory. At Time 1, 40.2% of the adolescents indicated deliberate self-harm on at least one occasion compared with 36.5% at Time 2. Test-retest data showed high stability over periods of up to 2 months in duration. Cross-validation of the results from Time 1 to Time 2 showed robust correlations between deliberate self-harm and general psychopathology, a relative absence of positive feelings toward parents, and a ruminative style of emotional regulation. Further, rumination/negative thinking and a relative absence of positive feelings toward parents were predictors of self-harm independently of general psychopathology. In addition, deliberate self-harm correlated with symptoms of eating disorder and negative body esteem in girls.

The psychometric properties of the Swedish self-report version of the Strengths and Difficulties Questionnaire (SDQ-s), and the prevalence of emotional and behavioral problems as measured by the SDQ-s, were studied in 14 to 15-year-old adolescents. The psychometric properties were found to be similar to those found in other language versions, in terms of similar factor structure and acceptable test-retest stability, but low internal consistencies for some of the subscales. There was evidence of good convergent and discriminant validity. The results with regard to gender differences replicated previous findings in other countries, the girls reporting more emotional symptoms and more prosocial behavior, and the boys reporting more conduct problems and tending to report more peer problems. It is concluded that the results are in favor of using the Swedish SDQ-s as a screening instrument for adolescents, despite the low internal consistencies of some of its subscales.