Yes, it is perfectly fine to pursue a Master's degree in Occupational Therapy (OT) if you have already completed a Bachelor's degree in Psychology. In fact, many students who are interested in OT choose to study Psychology as an undergraduate degree, as it provides a strong foundation in many of the scientific principles that are relevant to the field of OT.
There are a few key reasons why studying Psychology can be beneficial for those interested in a career in OT. First, Psychology provides a thorough understanding of human behavior, which is essential for OTs, who must be able to effectively assess and treat patients with a wide range of mental and physical disabilities. Second, Psychology courses often cover topics such as child development and psychopathology, which can be directly relevant to OT practice. Finally, many of the skills that are developed through studying Psychology, such as critical thinking and research methodology, will be essential in successfully completing a Master's degree in OT.
Of course, it is not essential to have a Bachelor's degree in Psychology in order to pursue a career in OT. However, if you are interested in this field, studying Psychology as an undergraduate degree can give you a strong foundation on which to build your future OT practice.