A robe of this nature appears to be a robe of another sort, and detection of any sort will discover nothing more than the fact that it has a magic aura. 

As soon as a character dons this garment, he or she drops to 3 Intelligence, forgets all spells and magical knowledge, and becomes weak as well (3 Strength). 

The robe can be removed easily, but in order to restore mind and body, the character must have a remove curse spell and then a heal spell placed upon his or her person.