Evidence for the impact of motivational and affective processes has implications for the interpretation and use of IQ tests. Traditionally, differences in performance on IQ tests are assumed to reflect only discrepancies in the disadvantages of intelligence tests: criticisms, limitations, and biases. Despite their benefits, IQ tests have faced severe criticism due to their limitations and biases. IQ, IQ tests: the danger of reading too much into them - and the crucial cognitive skills they don't measure. Posted: 7:57 a.m. EST. Today, however, achievement and IQ tests have the potential to identify talented students from all backgrounds – and therefore level the playing field for the public. If the goal is to measure intellect on a larger scale, the reliability of an IQ test is questionable. The usefulness of IQ as a form of assessment has been questioned by some scientists. Explain the advantages and disadvantages of taking IQ tests in general and their use in schools. One of the benefits of intelligence testing is identification.