Sonja Eisenbeiss is Lecturer in Psycholinguistics at the University of Essex. She has published on morphological processing, impaired and unimpaired first language acquisition, and the relationship between language and cognition. She has conducted experimental studies with children and adults and has developed games for the elicitation of various grammatical markers and constructions. Currently, she is analysing her extensive video-based corpus of German child language, funded by the Max-Planck-Society, with respect to children1's morphosyntactic development.

Bhuvana Narasimhan is Assistant Professor of Linguistics at the University of Colorado, Boulder. She conducts research on verb meaning, argument structure, and information structure from a cross-linguistic and developmental perspective. Current research is based on videotaped corpus and elicited production data from children and adults speaking a variety of languages including Hindi, Tamil, Dutch, and German.

Maria D. Voeikova is the Head of the Department of Grammar Theory at the Institute of Linguistic Studies, Russian Academy of Sciences, St Petersburg. She teaches Russian morphology and psycholinguistics courses at the Faculty of Philology and Fine Arts in St Petersburg State University. Her research interests and publications concern the functional description of Russian (Be-sentences, expression of quality, performatives, comparative studies) and the acquisition of Russian (quality and quantity, early vocabulary, diminutives, pre- and protomorphology, typological differences).