The purpose of this part of the multimethod Head Start bilingual/bicultural curriculum evaluation (Juarez and Associates, 1979), is to present the results of a pilot test of a battery of instruments to be used in assessing the effectiveness of four early childhood bilingual/bicultural curriculum models. The instruments pilot tested were the Bilingual Syntax Measure (second language acquisition), the CIRCO Subtests: Escuchen Este Cuento (Spanish language comprehension), the CIRCUS Subtests: Listen to the Story (English language comprehension), and the Preschool Inventory (English and Spanish concept development). Evaluation of the instruments focussed on three aspects: (1) the feasibility of successfully implementing the curriculum models in more than one setting; (2) the impact of each model on children enrolled in Head Start, on their parents, and on the Head Start teaching staff; and (3) the attitudes and opinions of Head Start staff and parents (who are in areas where the models are implemented) regarding the philosophy and objectives of each model and the quality of its programmatic contents. This document is concerned primarily with the second objective and presents a detailed analysis of the suitability of the field procedures and the appropriateness of the child impact assessment instruments. Also included are specific recommendations for improving both the procedures and the instruments during actual data collection. (Author/RH)