+1 IQ collar - for my wolf?

[Skarg]

In the absence of someone finding a rule that says what I was thinking, I suppose it's up to the GM (as always), or some future clarifying note from the publisher.

I and the people I played with tended to dislike and not include attribute enhancers, and from that perspective would point out the note on ITL 161: "These are thoroughly useful items, and GMs may wish to limit their availability drastically."

Allowing an IQ enhancer to let people learn spells does open up some odd exploits which different people might say was cool/interesting or annoying, e.g. a group or guild hall which has one might pass the item around from wizard to wizard, allowing the entire group to act for some purposes as if the entire group had higher IQ, but were limited to using it one at a time (whoever has the item at the moment).