@Opendaymaddnes if your daughter is predicted three A stars - it’s great. And she does not need more than 3.
For the STEM subjects like physics, engineering, computing, etc - kids often need 4 - as in Maths/Further Maths, and two sciences.
The stats @irregularegular posted are misleading - as any stats can be if you don’t look deeper.
For starters - these are APPLICANTS, not offers, and just one year of data.
So - for the total of Oxford:
… 2023
Applicants with 3+ A stars - 33%
Offers with 3 A stars - 60%
…2024
Applicants 3+ A stars - 21%
Offers 3+ A stars - 47+
Then you have to dig deeper and actually see the stats for individual courses - and you quickly realise that there is a big difference in admissions rates between, say Music, English, History with 30-40% admission rates - and Economics, Maths, Physics with 5-15% admission rates….
So, if you do find admissions rate for the subjects - which isn’t easy, but possible - you will see that in the most competitive courses with only a small percentage admitted, 80-90% of offers does go to kids with all A stars predicted. It is just common sense.
In less competitive subjects it is not the case - hence the total stats, that are misleading.
Psychology at Oxford is a small course, and is competitive, with about 15% acceptance.
Your daughter has the grades for it - so hope she gives it a try. The entrance test is really important and it’s helpful to practice over the summer. As well as read up on what the interviews would entail.