Standardized testing

So my opinion on standardized testing is that it actually just like IQ testing is just there to test us on how well we do under pressure. I took two different IQ tests, one where I answered with the first answer that came to mind and one that I actually thought about or worked on the questions and took time to answer the questions. I got an IQ of 125 on the one that i took time on and much lower on the one that I didn't take time on.
I think that for standardized testing has a negative impact, it stresses out the children because they put so much emphasis on doing well/your best. One of my 6th grade teachers during standardized testing gave us "smarties" one day to help us bring out our brains. The next day he gave us "dum dums" to try and encourage us to be smart.