Previous research has disagreed over the rate of sexual reoffending for juvenile sex offenders; some studies have indicated low sexual recidivism rates while others have found high sexual recidivism rates among this population of offenders. In 1994, the J-SOAP was developed to answer the need for a structured measure of recidivism risk among juvenile sex offenders. The J-SOAP has been subjected to many analyses since its development to examine its psychometric properties and its validity. The 3 studies reported on here examined the J-SOAP's factor structure and its concurrent validity among a group of 134 male juveniles drawn from the State of Maine. Trained coders reviewed the data on the juvenile offenders and coded the J-SOAP; coders also coded the Youth Level of Service/Case Management Inventory (YLS/CMI) in order to assess the ability of the J-SOAP to differentiate between juvenile sex offenders in the community and juvenile sex offenders in residential placement. Results indicated support for the a priori factor structure of the J-SOAP and for the composition of the four subscales of the J-SOAP. The concurrent validity of the J-SOAP was supported by high correlations with the YLS/CMI total score. Based on the findings, the authors revised the J-SOAP and are currently investigating the revisions with a sample of 600 youths; findings will be presented in a forthcoming paper. Tables, references