Find peer-reviewed, published research using the Inquisit Symbol Counter Task
Garavan, H. (January 01, 1998). Serial attention within working memory. Memory & Cognition, 26, 2, 263-76.
Garavan, H., Ross, T. J., Li, S. J., & Stein, E. A. (January 01, 2000). A parametric manipulation of central executive functioning. Cerebral Cortex (new York, N.y. : 1991), 10, 6, 585-92.