Well personally I've noticed increase in cognition, so the contrary. However I am also medically meant to be on HRT...but obviously I take bodybuilding blast doses too on top of HRT.
I've noticed increase in reflexes, thinking, confidence, quick response, you name it. Aggression if anything is the one thing I do not get (contrary to the roid rage mania of the media and government). I'm more focused, more determined, the works.
My memory has not faltered either thank God, so I dunno... I think some boneheads are just boneheads to begin with so... so if they cant' talk or think, hardly the case to blame it on steroids and blame it on being a 'meat head'