Final answer:
The typical effect of re-norming an intelligence test is an adjustment to scores reflecting generational changes and the Flynn effect, which shows higher IQ scores in successive generations, not necessarily indicating increased intelligence.
Step-by-step explanation:
Compared to scores obtained by older test norms, the typical effect of re-norming an intelligence test is that scores will adjust to account for population changes and may indicate a relative increase in IQ scores over time due to a phenomenon known as the Flynn effect. This effect is named after James Flynn, who observed that each generation tends to have higher IQ scores than the previous one. However, an increased IQ score does not necessarily mean a generation is more intelligent in a broad sense; it may reflect environmental factors such as educational practices and societal changes that influence what is measured as intelligence. The process of norming involves standardizing a test by administering it consistently to a representative sample of the population, establishing a bell curve with a mean IQ of 100 and standard deviations to interpret individual scores in context.