Cross-sectional studies with the WAIS suggest that significant age differences favoring young adults can be found by the 30s for performance tests and by the 60s for verbal tests. These differences, however, confound cohort effects in education and health status. By contrast, in longitudinal studies, reliably replicable average age decrements in intellectual abilities are rarely found before age 60, but they are observed for all intellectual functions at least by age 74. Analyses of individual differences in intellectual change, however, demonstrate that even at age 81 less than half of all observed individuals showed reliable decremental change over the preceding 7 years.
Was this article helpful?
You can find out step by step what you need to do to overcome the feeling of being shy. There are a vast number of ways that you can stop feeling shy all of the time and start enjoying your life. You can take these options one step at a time so that you gradually stop feeling shy and start feeling more confident in yourself, enjoying every aspect of your life. You can learn how to not be shy and start to become much more confident and outgoing with this book.