I automatically use the preposition "on" after the words "focus" or "emphasis". However, I've recently come across several instances of them being followed by "in", such as in the following examples:
She graduated with a degree in studio art, with a focus in printmaking.
or
He graduated with a degree in creative writing, with emphasis in fiction.
A quick Google search shows that this is pretty common. I'm not entirely convinced however, and I can't seem to find anything to support the use of "in" in dictionaries or style guides. Any help?
Best Answer
Except in very rare circumstances - for example, relating to camera lenses - you should use 'focus on'. Phrases such as 'with a focus in' are often used in reference to degrees, though. Speaking personally, it does sound correct even if it isn't. 'Focus on' works equally well in these situations, though.
If I were to speculate I might suggest that, using your creative writing example, the 'in' may serve to emphasise that the student's study was within the area of fiction rather than on the area as a whole. Perhaps their actual specialism was magic realism, for example. It may also imply inclusion within the field, as opposed to being an uninvolved third party.