Final answer:
The use of animals in psychological research raises ethical concerns regarding consent and the humane treatment of animals. Extra precautions such as obtaining ethical approval and designing experiments to minimize harm should be taken to ensure humane treatment.
Step-by-step explanation:
Using animals in psychological research raises several ethical issues. One main concern is the lack of consent from animals, unlike human participants who can give informed consent. To ensure the most humane treatment possible, extra precautions should be taken to minimize pain and distress for animals used in research. These precautions include obtaining approval from an Institutional Animal Care and Use Committee (IACUC), regular inspections of animal facilities, and designing experiments to minimize harm.