“…In the larger study, community mothers and infants were individually matched to high-risk mothers and infants on family income, mothers's education and race, and the child's age, sex, and birth order (firstborn, later-born). A complete description of the larger study design is available in Lyons-Ruth, Botein, and Grunebaum (1984). Relationships among maternal behavior, infant attachment, and infant mental development are available in Lyons-Ruth, Connell, and Zoll (1989), Lyons-Ruth, Connell, Zoll, and Stahl (1987), and Lyons-Ruth, Connell, Grunebaum, and Botein (in press).…”