Sensitivities of detonating compounds to frictional impact,impact, and heat

Using standardized tests, the sensitivities of twenty compounds and two mixtures to frictional impact, impact, and heat have been studied and recorded. The results show that values obtained by one test are not paralleled by those of either of the other two tests, but that, on division into classes, averages indicating a general correlation are obtained.     

An investigation of WISC-R verbal-performance differences as a function of ethnic status

The Wechsler Intelligence Scale for Children-Revised was administered to 187 black, 184 Hispanic, and 184 white children aged 6–11. The Verbal-Performance (V-P) IQ discrepancies were determined for the total group and for each ethnic group. The overall mean of 10.74 was similar to the V-P discrepancy found in the WISC-R standardization sample. The Hispanic group had a significantly greater V-P split than did the black group or the white group. Implications of these results were discussed, focusing on the various cautions of using V-P discrepancies for diagnostic decision making.     

Effects of type of reinforcement on the intelligence test performance of retarded black children

This study examined the effects of different types of reinforcement on the performance of black males who had been diagnosed as being mildly mentally retarded, using the WISC-R. After each correct response, participants were given no reinforcement, a candy reward, traditional social reinforcement, or culturally relevant social reinforcement. Children given tangible or culturally relevant rewards obtained significantly higher scores than did children given either no reinforcement or traditional social reinforcement.