Jerome Kagan - The Father of Temperament (repeat)

Why can two children born into the same household be like two different peas in a pod? Harvard's Jerome Kagan trailblazed the controversial science of temperament to investigate why. In a career that spans more than half a century, now he's going into battle for our minds, with a compelling retrospective, An Argument for Mind. To some an iconoclast - one of the biggest names in psychology of our time joins Natasha Mitchell, in this re-airing of a popular interview.