Using the preschool language scale, fourth edition to characterize language in preschoolers with autism spectrum disorders

Joanne Volden, Isabel M. Smith, Peter Szatmari, Susan Bryson, Eric Fombonne, Pat Mirenda, Wendy Roberts, Tracy Vaillancourt, Charlotte Waddell, Lonnie Zwaigenbaum, Stelios Georgiades, Eric Duku, Ann Thompson