There is relationship between SES and intellectual and academic competencies. Mc Call (1981) presented evidence that the association between SES and cognitive performance in infancy. Many studies showed that poverty and low parental education are connected with lower IQ level and school achievements later in childhood (Alexanderet al. 1993, Bloom 1964, Duncan et al. 1994, Escalona 1982, Hees et al. 1982, Pianta et al. 1990, Walberg & Majorbanks 1976, Zill et al. 1995). Kennedy and colleagues (1963) studied on African American children to represent African American living. The mean IQ of the highest SES group was 25 points greater than mean of the lowest SES group.
Few researches have worked on the relation between parental profession and intellectual progress development. Parcel and Menaghan (1990) found that mother who worked with variety of tasks and problem solving opportunities provided more warmth and acceptance. There children contained more advance verbal competence. Such results are consistent with classical argument of Kohan & Schooler (1982); what parents experience at work, they put it into their style of parenting.