"How much can these scores change over a person's lifetime, and how limiting are a person's scores for obtaining what they want out of life?
For groups of individuals, IQs are fairly stable between childhood and adulthood, but for specific individuals within a group, IQs can--and do--vary greatly over a lifetime. The IQs will vary as a result of specific interventions (such as preschool enrichment programs), quality education (or the lack of it), injuries that affect brain functioning, and other aspects of the environment that either enhance or diminish one's cognitive ability. In addition, errors of measurement are much larger than people tend to think, and, therefore, an individual's IQs will vary from time to time--sometimes substantially--simply due to the chance fluctuations that accompany any repeated measurement. And, there is more to life success than the ability to score high on IQ tests. People can be successful based on their creativity, street smarts, and personality variables."
Okay, I'll let someone else do it then...
"those measurements can be reproduced with statistical significance"
http://m.psychologytoday.com/blog/beautiful-minds/200910/int...
"How much can these scores change over a person's lifetime, and how limiting are a person's scores for obtaining what they want out of life?
For groups of individuals, IQs are fairly stable between childhood and adulthood, but for specific individuals within a group, IQs can--and do--vary greatly over a lifetime. The IQs will vary as a result of specific interventions (such as preschool enrichment programs), quality education (or the lack of it), injuries that affect brain functioning, and other aspects of the environment that either enhance or diminish one's cognitive ability. In addition, errors of measurement are much larger than people tend to think, and, therefore, an individual's IQs will vary from time to time--sometimes substantially--simply due to the chance fluctuations that accompany any repeated measurement. And, there is more to life success than the ability to score high on IQ tests. People can be successful based on their creativity, street smarts, and personality variables."