I definitely am a lot dumber when I am in a POIS state, but I haven't done a controlled experiment taking an IQ test in and out of POIS. I did take the WAIS IV in 8th grade when I imagine my POIS was fairly bad (though I was unaware of it) and scored substantially lower than I do on iq-like tests that I take these days when I am Oing maybe once a week on average. That being said, the tests I've taken since have not been the WAIS - the wonderlic and SAT are the ones that come to mind. My scores on each map to iqs approximately 20-30 points above my 8th grade WAIS score.