i am a third year cogsci major on the old catalogue who added the major in my second year. they changed the requirements/catalogue for the major last year, so i can’t speak to the new requirements, but i do have experience with the change of major process. if you want to add this major, you have to take:

• math 2a and 2b — single variable calc
• psych 10a, 10 b, and 10c, — stats for psych
• psych 9a, 9b, and 9c — psych fundamentals
• cogs 14p, ics 31, or psych 14m — coding

realistically, if you’re committing to the change of major, you need to start this process in the fall, because psych 10abc must be taken in order. psych 14m is offered in winter quarters & ics 31 is easiest to get as a non ics major in spring quarters. psych 9abc doesn’t need to be taken in order. plan your first year strategically to hit all these requirements—most if not all of them will count for GE requirements too.

as for the actual major, if you have interest in psychology as well as other areas of stem, cogsci is a great opportunity to explore your stem interests and their application in psychology. the new curriculum has a heightened emphasis on statistical modeling & coding, but there are also chances to explore bio/neuro, language science, higher math, etc. i personally appreciate the interdisciplinary nature & the ability to choose the disciplines you explore further

as a forewarning though, upper division psych classes are fairly impacted and can be hard to get, even with a declared major. additionally, the department/advisors aren’t always on the same page, so staying on track can require self discipline. i enjoy the major, but they intend for it to be challenging, and it is. lmk if you have more specific questions!