A recent article in the Wall Street Journal described how some wealthy are seeking to create intellectually gifted children using genetic testing and gifted surrogates. Yet most such efforts are doomed to fail though the children of high IQ parents do tend to have a higher IQ.
The best psychological tests are those of intelligence, the individually administered Stanford-Binet and Wechsler Scales. Studies have long found that the correlation between the intelligence of parents and their children is among the highest of all behavioral correlations but it is not perfect being in the low 80s. And though intelligence tests are excellent instruments, the accuracy of their findings depends on the skill of the examiner and the emotional and psychological readiness of the child to perform at their best. Moreover, for intelligence to flourish requires that the child experience a "good enough" though not perfect parenting during their earliest years, which can be problematic. Perhaps these parents would do better concentrating on parenting skills rather than biology.