Which of the following taxonomy pairs would violate double indexing guidelines?

Double indexing refers to the practice of assigning more than one category to a single item within a classification system, which can lead to confusion and redundancy. In order for taxonomy pairs to adhere to guidelines, the relationship between the two categories needs to be distinct without overlapping.

The pair of "General counseling services" and "Group Counseling" would violate double indexing guidelines because group counseling is a specific type of general counseling. Since "Group Counseling" falls under the broader category of "General counseling services," assigning both categories to the same entity is unnecessary and can cause duplication within the indexing. This redundancy does not provide new or useful information about the service being described and instead complicates the classification system.

The other pairs retain a clearer distinction in their categorization. For example, "Community mental health agencies" is a more general category, while "Family counseling" does not directly fall within the realm of community mental health agencies as a specific practice. Hence, this distinction helps maintain clarity within the taxonomy without creating overlapping classifications.