Questioning construct validity

One of the biggest issues with using IQ is the degree to which any test measures the construct it proclaims.

IQs construct does not exist

• in the sense used in scientific measures
• or knowing what differences on the 'inside' are being truly reflected in the scores on the 'outside.' This is simply because few agree on what happens on the 'inside.'

In job performance, the correlations in IQs are doubtful. There is little if any correlation with later job performance or other markers of success. The job performance measures that many studies rely upon are themselves not reliable.