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Although psychology and dog training may appear to be quite different professions, the philosophies of how we interact with dogs and with people in a positive way actually have much in common. Furthermore, the evolution of both dog and child psychology have followed similar paths.


Is the underlined "have" correctly used here?


Thanks a lot.

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shcho23Is the underlined "have" correctly used here?

Technically, 'has' is required, but 'have' doesn't seem to bother me; I mentally adjust the meaning as follows:

the evolution of both dog and child psychology
~
(both) the evolution of dog psychology and the evolution of child psychology

Besides, one thing can't "follow similar paths" in the intended reading.

CJ

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shcho23Is the underlined "have" correctly used here?

No. Has should be used because evolution is singular.

CB