Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 23

In acquiring language, all children go through the same four stages but at different rates. Beginning at about the age of 6 months, a baby begins making one-syllable sounds, such as "bababa," which is called (a) _____. By about 1 year of age, a child forms (b) _____ words, which usually refer to what the child can see, hear, or feel. At about 2 years of age, a child makes (c) _____, which are strings of two words that express various actions ("Me play") or relationships ("Hit ball," "Milk gone"). At about 4 years of age, a child begins forming sentences, which range from three to eight words in length and indicate a growing knowledge of the rules of (d) _____.