Listening Crews Background The reliability and validity of results yielded by Diagnostic Rhyme Test (DRT), Diagnostic Acceptability Measure (DAM), Paired Acceptability Rating... are further screened by means of a pure-tone audiometric screening test and various speech perception tests. Measures of the candidate's self consistency and conformity with established... level and greatest stability of performance when he/she is a test participant on a regular basis with a carefully regulated work load. At Dynastat, all crew members normally...