Abstract
The internal consistency and convergent and discriminant validity of
the d2 Test, a cancellation test of attention and concentration, was
examined in a sample of 364 U.S. adults. Test-taking strategy, new
process scores for assessing performance constancy, and relations to
gender and education were explored. Results suggested that the d2 Test
is an internally consistent and valid measure of visual scanning
accuracy and speed. Overall performance scores were related to a proxy
measure of test-taking strategy in the expected direction, and new
acceleration and deterioration measures exhibited convergent validity.
Suggested directions for future research include discrimination of
attentional processes that support immediate and sustained visual
scanning accuracy and speed, further examination of the impact of
test-taking strategies on overall performance measures, and additional
construct validity examinations for the new process measures.
(JINS, 2004, 10, 392–400.)