Evidence suggests that animals are not allowed to suffer at all, per guidelines by the APA.
Psychological experimentation is when scientific methods are used to provide answer to some questions by researching the mind and behavior.
Some of the guideline provided by American Psychological Association for performing psychological experiment on animals are:
Therefore, evidence suggest that animals are treated humanely and animals are not allowed to suffer at all, per guidelines by the APA
Learn more about who introduce psychological experimentation for animals here
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