Procedures are described to determine reliability and validity of the Brockton (Massachusetts) Battery's Tests of Reading Readiness and the Adaptive Behavior Scales, which were developed to assess performance levels of Hispanic, Portuguese, and Cape Verdean normal and high risk children. Among reasons given for development of the instruments are availability of few tests with an appropriate Spanish vocabulary, few in Portuguese, and none in Crioulo, a Portuguese-African dialect used by 212 local children from the Cape Verdean Islands. Discussed are the statistical analyses of the 2 year validation studies involving reliability and validity correlation between results achieved by 55 first grade Hispanic and Cape Verdean students on the 15 Reading Readiness Tests and the Holt Mastery Tests. Use of the "Predictive Index" to refer grade 1 children from bilingual programs to special education evaluation is outlined. Explained are development and validation of "Adaptive Behavior Scales" for age levels 2 through 14 for self maintenance which examines four behavioral areas: (1) membership in a peer group, (2) membership in a family, (3) membership in a community group, and (4) consumer activities. Appendixes, which constitute half the document, include statistical tables and the tests in the three languages. (MC)