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Table 2 Sample characteristics: psychometric measures

From: Mapping anhedonia onto reinforcement learning: a behavioural meta-analysis

Measure N mean median 1st quartile 3rd quartile
BDI 366 8.3 6 1 11
BDA 281 1.9 0 1 3
BDI\A 281 6.9 1 5 10
Generalized distress depression (GDD) 276 23.2 16 20 30
Generalized distress anxiety (GDA) 276 18.8 15 18 24
Anxious anxiety (AA) 276 53.7 45 53.5 65
Anhedonic Depression (AD) 276 21.1 17 20.5 25
Full (BDI + BDA + MASQ subscores) 255     
  1. BDI is the total Beck Depression Inventory II [16]. BDA stands for the anhedonic subscore of the BDI consisting of the sum of items 4 (loss of pleasure), 12 (loss of interest), 15 (loss of energy) and 21 (interest in sex). BDI\A is the total BDI score without the anhedonic component (BDI\A = BDI - BDA). Mood and Anxiety Symptom Questionnaire (MASQ) subscores [17] were anxious arousal (AA), anhedonic depression (AD), general distress anxiety (GDA) and generalised distress depression (GDD).