Bibliography (8):

1. Bifactor and Hierarchical Models: Specification, Inference, and Interpretation

2. The Psychosis Continuum: Testing a Bifactor Model of Psychosis in a General Population Sample

3. Is there a general factor of prevalent psychopathology during adulthood?

4. A comparison and integration of structural models of depression and anxiety in a clinical sample: Support for and validation of the tri-level model

5. On the relationship between the higher-order factor model and the hierarchical factor model

6. Wikipedia Bibliography:

   1. Factor analysis

   2. Latent and observable variables

   3. Statistical-significance