The Emory Word Analysis Skill Inventory (EWASI) was developed to diagnose individual word analysis skill abnormalities exhibited by students enrolled in private tutoring in the Emory University (Georgia) Reading Center. In the EWASI, 13 subscales contain three broad categories--consonants, vowels, and word structure. The goal, however, is to represent word analysis skill as a single dimension while partitioning out the subscales and subgroups for the purpose of diagnosing specific reading abnormalities. The calibration sample for two EWASI forms was 156 students enrolled in the Emory Reading Center during the 1978-80 school years. The test items were investigated for item invariance; results indicated that the hierarchy of word analysis skill items calibrated on the EWASI remained invariant across time, form, instruction, and sex. The test items were also examined for reliability and validity. A case study of an actual student is used to demonstrate the utility of the test and to help the reading tutor focus on the basic, non-statistical method of recording and interpreting test results. Charts and tables illustrate the text. (Author/MLF)