The process of adapting the Wechsler Intelligence Scale for Children-Revised (WISC-R) for Puerto Rico was begun with the following objectives: (1) to review the existing Spanish translation of the WISC-R; (2) to adapt the WISC-R to Puerto Rican culture and milieu; and (3) to standardize the scale with a representative sample of Puerto Rican children and adolescents. A revised version was prepared to improve the translation and eliminate cultural bias. An item bank was tested with 240 children and adolescents from public and private schools in Puerto Rico to select items for the final form. The final form was standardized with 2,200 subjects whose native language was Spanish. The test was administered by 16 testers trained in the examination process. Information about the background of subjects was completed for 81% of the sample. The examination process began in October 1988 and was completed in December 1989. Data input and analysis continue to enable the eventual measurement of the cognitive abilities of Puerto Rican children and adolescents using a valid, reliable, and locally standardized test. Ten tables present study information. A 33-item list of references is included. (SLD)