Figure 1
From: General and specific components of depression and anxiety in an adolescent population
Schematic illustration of four alternative latent variable models. Notation: D, depression; A, anxiety; W, worrying; S, somatic symptoms; G, general distress factor; Sp1-Sp3, specific factors. Model 1, unidimensional model with one general factor; model 2, two-factor model with a depression/worrying factor and a somatic factor; model 3, three-factor model with a depression, a worrying and a somatic factor; model 4, bifactor model with a general distress factor and specific factors. Models each comprised 61 items, not all items are shown on the figures.