In an era of evidence-based practice, why are clinicians not typically engaged in evidence-based assessment? To begin to understand this issue, a national multidisciplinary survey was conducted to examine clinician attitudes toward standardized assessment tools. There were 1,442 child clinicians who provided opinions about the psychometric qualities of these tools, their benefit over clinical judgment alone, and their practicality. Doctoral-level clinicians and psychologists expressed more positive ratings in all three domains than master's-level clinicians and non psychologists, respectively, although only the disciplinary differences remained significant when predictors were examined simultaneously. All three attitude scales were predictive of standardized assessment tool use, although practical concerns were the strongest and only independent predictor of use. (Contains 4 tables.)