Robert W. Schrauf is professor and head of the Department of Applied Linguistics at the Pennsylvania State University. He conducts both qualitative and quantitative research in cross-cultural gerontology, narrative gerontology, Alzheimer's disease, experimental and longitudinal approaches to multilingualism, and bilingual autobiographical memory. He is former president of the Association for Anthropology and Gerontology, a fellow of the Gerontological Society of America, and member of the editorial boards of the Journal of Cross-Cultural Gerontology and Cross-Cultural Research. Nicole Müller is a professor of Communicative Disorders at the University of Louisiana at Lafayette, where she holds a Doris B. Hawthorne/BoRSF Endowed Professorship. Her areas of research interest include clinical linguistics, clinical discourse studies and pragmatics, age-related disorders of communication and cognition, multilingualism, and systemic functional linguistics. She is co-editor of the journal Clinical Linguistics and Phonetics and of the book series Communication Disorders across Languages.