Could depression make your IQ decrease??

I don't think it's likely but it doesn't exactly seem impossible either. A lot of people dispute IQ anyways. Intelligence has always been difficult to measure especially in people, as complicated as we are. If one man can't spell his own name but excels at playing the violin, does that make him unintelligent? It's a complex thing to determine.

No. Maybe be more apt to make bad decisions. Of course if you took an IQ test while depressed, you may not score as high because you are distracted.

IQ is pretty much stable throughout your entire life. I'd guess that they'd score lower on a test than they usually would if they were in a better place mentally.. but I doubt their IQ actually decreased

Temporarily, yes. Lack of focus or sleep or distraction could make you a less able thinker.

I feel it might put it into slumber. Depression is an animal that should never be taken lightly

your what??

Typo..... Corrected