Due to the recent development of test instruments designed to assist professionals in the evaluation of child maltreatment cases, social service professionals must become familiar with issues related to test construction and use. The purpose of the present paper is to provide the reader with a discussion of issues related to test selection and use. This article, however, is not Intended to be a substitute for a basic understanding of the test validity and reliability. The paper begins with a review of different prevention modes and discusses how each mode uses test data. Next, test use as it relates to assessment is outlined. Within the context of assessment, types of test classification errors are discussed. Finally, a number of general test Issues that can affect test results are presented.