“…Aspects of caregiver behaviour, detailed below, have been identified as important in the development of mastery motivation. Studies with normally developing children have generally found that amount and variety of stimulation is associated with increased mastery motivation (e.g., Barrett, & Maslin-Cole, 1993;Yarrow, Morgan, Jennings, Harmon, & Gaiter, 1982), however, a study of children with Down syndrome (HauserCram, 1993) found that higher levels of maternal interaction acted to reduce mastery motivation in these children. A number of studies that have examined mother-child interaction have found that the mothers of children with Down syndrome are likely to take the initiative for a disproportionate amount of the time (Jones, 1977;Mahoney, Fors, & Wood, 1990;Mahoney & Robenalt, 1986;Stevenson, Leavitt, & Silverberg, 1985) and some authors suggest that this may be implicated in the lower levels of mastery motivation seen in these children (e.g., Jobling, 1996).…”