This study examined the relationship between either mothers' (Grandmother; GM) or fathers' (Grandfather; GF) parenting in the mothers' childhood, and the present mothers' sensitivity toward their infants. Also, examined were the influence of either mothers' (GM) or fathers' (GF) parenting in the mothers' childhood and the existence of positive important others on recent mothers' sensitivity to their infants. The participants were 100 pairs of infant (the stage of starting baby food~8months old) and their mothers. Mothers' (Grandmother; GM) and fathers' (Grandfather; GF) parenting, and the existence of positive important others were rated and judged on the basis of the mothers' interview, and the mothers' sensitivity was rated on the basis of the videotaped mothers-infants interactions (feeding and playing) in their homes.
It was found that better the either mothers' (GM) or fathers' (GF) parenting in the mothers' childhood, the higher recent the mothers' sensitivity to their infants. In addition, mothers who have both mothers' (GM) negative parenting in the mothers' childhood and the positive important others in the mothers' childhood had higher sensitivity than mothers who have both mothers' (GM) negative parenting in mothers' childhood and nobody positive important in the mothers' childhood. Generally, it was suggested that though relations between parents' parenting in the mothers' childhood and the present mothers' sensitivity to their infants was found. Also, the existence of positive important others in the mothers' childhood is useful for mothers who have mothers' (GM) negative parenting in the mothers' childhood in heightening the mothers' sensitivity to their infants.