Question: Apply the normal-latent beta model to data on short-term changes in depression ratings (Tarpey and Petkova, 2010). Such changes in depression are unlikely to be

Apply the normal-latent beta model to data on short-term changes in depression ratings (Tarpey and Petkova, 2010). Such changes in depression are unlikely to be due to the pharmacological intervention, and can be plausibly explained by a latent continuous placebo effect, namely

y~N(Bo+Bx; o), x; ~ Be(a1, a2), with x; as the latent predictor.

y~N(Bo+Bx; o), x; ~ Be(a1, a2), with x; as the latent predictor. For identifiability, it is recommended to assume > 0.

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