my iq was and is the same.what changes with any depressive illness is an inability to concentrate,the root of which is an eternal search for meaning in the outside world and an introspection that eventually infects every aspect of your cognation.shapes of letters become more to the fore than the meaning behind the words.memory is sabotaged by ultra focus on inner dialogue.you may read and reread a page,a paragraph or an individual sentence and not remember what it was about.this happens more and more often until it becomes a constant,dreamy habit.the good news is that you get your old cognation back,if you keep trying.find books on subjects that you are interested in and off you go.hope this helps,thats what happened me anyway.