Papers are presented from a conference that dealt with the similarities and differences between first and second language learning, ways of assessing the relationships, methodological procedures, and implications for development of procedures for teaching language handicapped children. The papers are presented under the following headings: (1) "Differences and Similarities between First- and Second-Language Acquisition"; (2) "Neurophysiological Processes in Language Acquisition"; (3) "Phonology and Phonetics"; (4) "Syntax, Semantics, and Pragmatics--First Language"; (5) "Syntax, Semantics and Pragmatics--Second Language"; and (6) "Implications for Learning a Second Language." The articles were contributed by J. Alatis, S. Anderson, J. Asher, E. Bates, S. Belasco, R. Blake, L. Bloom, M. Bowerman, A. Bronstein, D. Bud, R. Burling, R. Cole, V. Cook, B. DeMarco, K. Diller, S. Ervin-Tripp, C. Ferguson, J. Gary, N. Gary, D. Ingram, M. Kinsbourne, W. Lambert, S. Leventer, P. Lightbrown, M. Long, M. Macken, B. MacWhinney, B. McLaughlin, L. Menn, J. Mooijman, K. Nelson, M. Patkowski, A. Ray, R. Rieber, H. Seliger, C. Snow, F. Stevens, M. Studdert-Kennedy, H. Whitaker, H. Winitz, H. Wode, and C. Yorio. (AMH)