The Subjects (0:31); Final Responses in the "Hand-in-Loop" Problem (1:55); Measuring the Accuracy of Locating a Sound (4:13); Solutions of the "Suspended Cookie" Test (2:53); The Hoe or Rake Experiment (4:03); Credits: Experiments Upon a Human and a Chimpanzee Infant after 6 Months of Association in the Same Environment (0:03);