What supporting evidence is there for the role of social releasers? "- Clear evidence that social releasers are intended to initiate social interaction - and that this important to the baby. - Brazelton et al. observed interactional synchrony in mothers and babies. - Experimented further instructed primary caregivers to ignore babies' signals. - Babies showed distress initially but eventually responded by curling up and lying motionless. - The strength of the reactions supports Bowlby's ideas about the significance of social releasers in eliciting caregiving. "