AO3 - Different research questions
E: looked at the quality of play, sensitive responsiveness and secondary attachments, all separate concepts in attachment.
E: Results of each of these studies should therefore not be compared or put together as all used different methods and had different experiments, produce different result about the role of the father.
L: Role of the father not clear, as no conventional role is shown.
CA: Show that the actual role of the father is varied and that there is variation the father forms attachments with the child, more holistic.