Fig. 3

Distributions for simulated total depressive symptom scores when the latent trait was set to exponential distribution with a parameter of λ = 1. Exponential distribution with a parameter of λ = 1 was set for the latent trait of depressive symptoms, and normal distributions with standard deviations of 1 (a), 2 (b), 3 (c), and 4 (d) were used for the distribution of depressive symptom thresholds. SD standard deviations