Minnesota Symposia on Child Psychology: Volume 2 was first published in 1969.This is the second volume in the series which is based on papers from the annual Minnesota Symposia on Child Psychology, sponsored by the Institute of Child Development at the University of Minnesota. Volume 2 presents material from five papers given at the 1967 symposium. For each symposium a number of outstanding child psychologists are invited to give papers dealing with their own programs of research. Each participant is provided with the opportunity of summarizing and integrating the findings of several studies and discussing the conceptual framework or rationale for the series of studies.This volume includes five papers ten contributors: “Stable Patterns of Behavior: The Significance of Enduring Orientations for Personality Development” by Wanda C. Bronson; “The Child’s Grammar from I to III” by Roger Brown, Courtney Cazden, and Ursula Bellugi-Klima; “A New APPROACH to Behavioral Ecology” by Bettye M. Caldwell; “Effects of Cognition on Perception: A Problem and a Paradigm for Developmental Study” by Maurice Hershenson; and “Cross-Cultural Longitudinal Research on Child Development: Studies of American and Mexican Schoolchildren” by Wayne H. Holtzman, Rogelio Diaz-Guerrero, Jon D. Swartz, and Luis Lara Tapia.