Evaluating the Structural and External Validity of a Self-Report Measure of Cognitive Disengagement Syndrome in a Clinical Sample of Adults in Turkey

Abstract The internal (structural) and external validity of a self-report measure of cognitive disengagement syndrome (CDS, formerly sluggish cognitive tempo) relative to a self-report measure of attention-deficit/hyperactivity disorder-inattention (ADHD-IN) was evaluated with adults from university outpatient psychiatric clinics in Turkey. A total of 274 outpatients (75.9% women; Mage = 31.06; SDage = 10.84; 50.4% anxiety disorders; 41.6% depressive disorders; 2.9% ADHD; 1.5% sleep disorders; 0.7% eating disorders; 2.9% no mental disorder) completed self-report measures of CDS, ADHD-IN, ADHD-hyperactivity/impulsivity (HI), sleep problems, depression, and stress. All 15 CDS symptoms on the Adult Concentration Inventory showed convergent (moderate to high loadings on the CDS factor) and discriminant (loading close to zero on the ADHD-IN factor) validity. CDS also showed stronger first-order and unique associations than ADHD-IN with sleep problems, depression, anxiety, and stress, whereas ADHD-IN showed stronger first-order and unique associations than CDS with ADHD-HI. This is the first study to provide support for the scores from this 15 symptom self-report measure of CDS in a clinical sample of adults, with findings consistent with previous studies examining parent and teacher rating scale measures with the same 15 CDS symptoms. These findings provide additional support for usefulness of these 15 CDS symptoms to study CDS across various cultures.