Assessment of the effort level is an essential step in establishing the internal validity of any neuropsychological evaluation. The use of response bias measures as part of a core battery, however, is less common outside of forensic evaluations. The amount of time needed to administer many of these tests is often cited as a likely explanation for their exclusion from routine neuropsychological evaluations. This study examined all three trials of the Test of Memory Malingering (TOMM) in a large sample (n = 213) of inpatients on an epilepsy monitoring unit with the goal of establishing cut scores for early termination. TOMM Trial 1 demonstrated impressive diagnostic accuracy for determining both adequate and suboptimal levels of effort; various cut scores and classification statistics are presented. The optional Retention trial from the TOMM also increased the hit rate 16% in the detection of poor effort. Clinical implications, limitations, and directions for further research are discussed.