The psychological well-being of laboratory primates is enhanced when they are allowed to voluntarily participate in their own care through a process called positive reinforcement training (PRT).

The use of systematic preference assessments can enhance positive reinforcement training with captive animals. We found that the multiple stimulus without replacement (MSWO) technique identified food ...

Positive reinforcer identification is essential to many types of teaching and treatment. The literature has advocated both questionnaires and empirical preference assessments. However, questionnaires ...