In response to a mandate from the California State Legislature, the California Board of Corrections conducted a three-phase research study in preparation for the revision and standardization of the current state standards for hiring and training corrections personnel. The primary focus of the second phase of the project was on the development and validation of entry-level selection procedures for these positions. This set of technical reports deals with the process of developing and validating the criteria on which the selection procedures developed were based. The validation report covers the following topics: the project goals and the research strategies used to achieve them; the principal results of the job analysis; the predictor and criterion development processes; data collection procedures used; the criterion, predictor, and validity and fairness analyses used in developing the selection battery; and recommendations pertaining to administering and scoring the test. The technical adequacy report discusses the validity of the testing program in view of the fact that, although the original project plans called for testing a minimum of 500 probation officers, the final validation sample ranged from 284 to 322 officers depending on the analysis being conducted. (MN)