What important change was made in the DSM versions that followed DSM-III?

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The DSM versions that followed DSM-III moved away from a presumed theoretical cause for each disorder, allowing for a more descriptive approach to diagnosis. This is exemplified in the shift from the use of Roman numerals (which implied a theoretical order) to Arabic numerals in DSM-III-R. However, there was still a focus on reliability and validity in these later versions. There was not a change from a dimensional to a categorical system, and there was not a specific inclusion of the humanistic view of pathology.

What Important Change Was Made in the DSM Versions That