“…Moreover, these two types of interactions relate to children’s later social and cognitive development (e.g., Bakeman, Adamson, Brown, & Eldridge, 1989; Bornstein, 1989; Clarke-Stewart, 1973; Olson, Bates, & Bayles, 1984; Smith, Adamson, & Bakeman, 1988; Yarrow, Rubenstein, & Pedersen, 1975). Bakeman and Brown (1980) found that infants who showed greater responsiveness when interacting with their mothers also interacted more with other people and did so more competently at 3 years. Olson et al (1984) found that mother–infant object-centered interactions predicted child cognitive and language competence (Bayley Mental Development Index and Peabody Picture Vocabulary Test) at 2 years, and Bornstein (1985) also found that mothers’ object-centered activities with young infants predicted children’s language and cognitive competence (vocabulary, Wechsler Preschool and Primary Scale of Intelligence) at 1 and 4 years.…”