Dr. Bates was a founding member of the Cognitive Science Department at University of California at San Diego (the first of its kind in the world), the Director of the federally-funded UCSD Project in Cognitive and Neural Development, a founding co-director of the innovative Joint Doctoral Program in Language and Communicative Disorders at San Diego State University and UCSD, and the Director of the Center for Research in Language and Professor of Cognitive Science at UCSD. With strengths in developmental psychology, linguistics, neurology, and cognitive science, she carried out many creative and influential collaborative studies on the interrelations among language acquisition, brain function, symbolic growth, and other key aspects of development. During her extensive career, she directed cross-linguistic studies on 4 continents and authored or co-authored 10 books and more than 200 scientific publications. Her work was interdisciplinary, influencing diverse fields such as neuroscience, linguistics, biology, psychology, computer science, and medicine. Barbara Conboy, Ph.D., is currently a postdoctoral Research Associate at the Center for Mind, Brain & Learning at the University of Washington. She earned a doctorate in language and communicative disorders at the University of California, San Diego/San Diego State University; a Master of Arts degree in speech-language-hearing at Temple University; and a bachelor of arts in Latin American studies at Smith College. She is certified by the American Speech-Language-Hearing Association as a speech-language pathologist and has worked extensively with bilingual children with language-learning disorders. Her research interests include early bilingualism, experiential factors in language acquisition and brain development, and the early identification and treatment of language impairment in bilingual children. Larry Fenson, Ph.D., is Professor of Psychology at San Diego State University in California. Dr. Fenson has published research on infant attentiveness, early symbolic development, categorization, children's drawing skills, play, and early language development. He received his doctorate in child psychology from the University of Iowa. He served as Assistant Professor at the University of Denver and was a National Institute of Child Health and Human Development postdoctoral fellow with Jerome Kagan at Harvard University. Dr. Fenson is Chair of The CDI Advisory Board. Donna Jackson-Maldonado, Ph.D., is Professor at Department of Languages and Literature (Facultad de Lenguas y Letras) in Universidad Autonoma de Queretaro, Qa de Cedros, Mexico. Dr. Jackson-Maldonado was born in the United States but was brought up in Mexico. She has lived in a bilingual-bicultural environment all of her life. Her initial professional experience was as a speech-language pathologist working with children with language disorders and learning disabilities and deaf children. She also has worked for the Mexican government's special education and communication disorders programs, doing in-service training, writing books and manuals, and developing language assessment instruments. Dr. Jackson-Maldonado received her doctorate in linguistics from El Colegio de Mexico in Mexico City. Her research has been in Spanish and bilingual language development in infants and toddlers. Part of this work was the development of the Mac-Arthur Inventarios del Desarrollo de Habilidades Comunicativas and, with Donna J. Thal, a language and gesture battery for Spanish speakers. Dr. Jackson-Maldonado is currently a full-time professor and researcher at the Universidad Autonoma de Queretaro in Mexico. She directs a project on late-talking Spanish-speaking toddlers. Virginia A. Marchman, Ph.D., is Associate Professor in School of Behavioral and Brain Sciences at the University of Texas at Dallas, Richardson, Texas. Dr. Marchman holds a master of arts degree and a doctorate in d"