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Did anyone else notice "About 1 in 5 (3,231) scored in the 90th percentile or higher, qualifying them for neighborhood-based gifted programs, and 9 percent (1,3
by Dilpil 17y ago
Did anyone else notice "About 1 in 5 (3,231) scored in the 90th percentile or higher, qualifying them for neighborhood-based gifted programs, and 9 percent (1,345) made the 97th percentile"?
- wtallis 17y agoSo? There's a selection bias in who attempts to qualify for gifted programs, and the quoted percentiles are relative to the general population. These kinds of tests aren't re-normed with every administration. The magnitude of this selection bias doesn't seem at all surprising.