Although it is possible to move between the BA and BSc after first year, that process can be complicated and switching might extend the length of time it takes to complete a degree. Because of the potential complications we encourage students to think carefully about which program is best for them when they apply.
You may be wondering about the difference is between a Bachelor of Arts in Psychology and a Bachelor of Science in Psychology. This may be somewhat surprising, but the major distinction is not what students learn about Psychology. Instead, the real differences involve the training students receive outside of Psychology. Specifically, BSc students must take biology and chemistry courses in addition to their Psychology requirements. BSc students are also required to take more Psychology courses from our natural sciences lists but it is important to note that these courses are also available to students in the BA program on an optional basis.
Note that BA and BSc students get the same training in research methods and are equally prepared for post-graduate studies. Students hoping to apply to Medical School may have a slight advantage with the BSc (because the required Biology and Chemistry training is embedded in the program requirements) but students with a BA can also apply to Medical School as long as they take those science courses as electives. The admission requirements are different and reflect the background that BSc students need for their non-Psychology requirements in the natural sciences. You may still be wondering how to decide which option is best for you. Generally, if you love the natural sciences (biology, chemistry, and physics), you would probably be best suited to the BSc. If you are more interested in the arts and social aspects of human behaviour you are probably a good fit for the BA program.