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The common pathway model, in its simplest form, parametrises a single latent factor (CF), influenced by both genetic (A) and residual (E) sources of variance, in addition to measurement-specific genetic (AS) and residual (ES) influences.
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Example of a quad-variate CP model (k=4):
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![model_quadvariate_path_diagram_IP](uploads/57b0c178ceb3c37cd809371679768231/model_quadvariate_path_diagram_IP.png) |