This is the complete report of the Schools Council Research and Development Project on Attitudes to and Motivation for the Learning of Welsh and English in Wales, based at the Department of Education, University College of Swansea. The project began in October 1967 and was completed in August 1971. Its chief aims were the following: (1) to establish patterns of attitude toward Welsh and English in three age groups in schools throughout Wales, (2) to determine whether there is a significant relationship between attitude toward each language and attainment in it, (3) to examine some of the other factors in the language learning situation in Wales, (4) to consider methods and materials used in the teaching of the two languages. This report includes description of the sampling procedure, attitude scales, and tests, background information, and a summary of the main findings. The appendices are in Welsh and English and contain the tests and questionnaires used in the study and tables summarizing results. (PMP)