One of the most successful efforts to reduce risk factors for a medical condition involved three entire communities in California in which residents received different types of interventions or no intervention at all (for the community that served as the control group). The targeted condition in this effort was

a. diabetes

When using the strategy of rehearsal, older children tend to use a cumulative style—repeating everything several times. In contrast, younger children use a passive style—repeating ________ they are trying to remember

A) only the first word B) the first few words C) the last word D) every other word

Four-year-old Nicco uses infant-directed speech when talking to his neighbor's new baby; this demonstrates ____________________

a. overregularization b. fast mapping c. pragmatics d. existence of the language acquisition device