Brief intelligence tests.
Some tests also have a "brief" version that can be administered to an individual child in 15-20 minutes, e.g. the K-BIT (Kaufman Brief Intelligence Test). Brief tests are designed as screening measures, to determine which students should proceed to a full evaluation. Schools and districts sometimes use these brief measures as the only evaluation, resulting in an incomplete assessment of the gifted children. Brief measures have so few questions that they can result in scores that do not correlate well to full intelligence tests.
http://www.hoagiesgifted.org/tests_tell_us.htm
