The Essential Parenting Guide-NOW COMPLETELY UPDATED AND EXPANDED!
In 1982, child development experts Linda Acredolo, Ph.D., and Susan Goodwyn, Ph.D., discovered that babies can communicate with simple signs-even before they're able to talk.
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Linda Acredolo,Ph.D., ProfessorEmeritus ofPsychology at theUniversity ofCalifornia atDavis, is aninternationally recognized scholar inthe field of child development. She isa Fellow of both the AmericanPsychological Association and the American P