Berk's ninth edition Child Development text book last published in 2013. There are at least ten pieces of parenting advice that can be found in Berk's book which are then supported by numerous evidence and research. ... At 2 months, cooing appears which is vowel-like noises and by 6 months babbling occurs which is just how it sounds; infants tend to repeat consonant-vowel combinations( "bababababa" or "nananananana"), to develop babbling further infants must hear human speech (IDS) (Berk, 2013, p. 370). ...

• Word Count: 2833
• Approx Pages: 11
• Has Bibliography
• Grade Level: Undergraduate