What type of classification approach did Thomas Achenbach use when using factor analysis to identify the symptoms that tend to co-occur within the realm of child psychopathology?

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Achenbach used a dimensional classification approach when using factor analysis to identify the symptoms that tend to co-occur within the realm of child psychopathology. This means that he looked for patterns of symptoms that occur together, rather than trying to fit each symptom into a specific diagnostic category.

What Type of Classification Approach Did Thomas Achenbach Use When