support for the internal working model
Bailey assessed attachment in 99 mothers to their one year olds and he measured the mothers attachment to their own mothers.
Poor attachment to own mother showed poor attachment quality to babies
supports idea that future attachments are linked to internal working model
However, there are probably other important influences on social development, like genetic differences in anxiety and sociability and these differences could also impact parenting ability so bowlby may have overstated the importance of the internal working model.