Using norms for non-delinquents as a basis for comparison, juvenile delinquents, age for age, are emotionally retarded as measured both by total scores on the interest-attitude tests and by scores on separate tests. The extent of emotional retardation varies somewhat with life age. An insignificant relationship is found to exist between emotional age and degree of delinquent behavior. Although the co-variation between emotional age and the delinquency index is of only moderate significance, yet the distinctive fact of emotional retardation among delinquents suggests that maturation of emotional behavior is probably of as much significance as intelligence and other variables in a more complete understanding of the personality of the juvenile delinquent. (PsycINFO Database Record (c) 2006 APA, all rights reserved)