| PAGE | |
| The Study of Consciousness and the Study of Behavior | 1 |
| Animal Intelligence | 20 |
| Introduction | 20 |
| Description of Apparatus | 29 |
| Experiments with Cats | 35 |
| Experiments with Dogs | 56 |
| Experiments with Chicks | 61 |
| Reasoning or Inference | 67 |
| Imitation | 76 |
| In Chicks | 81 |
| In Cats | 85 |
| In Dogs | 92 |
| The Mental Fact in Association | 98 |
| Association by Similarity and the Formation of Concepts | 116 |
| Criticism of Previous Theories | 125 |
| Delicacy of Association | 128 |
| Complexity of Associations | 132 |
| Number of Associations | 135 |
| Permanence of Associations | 138 |
| Inhibition of Instincts by Habit | 142 |
| Attention | 144 |
| The Social Consciousness of Animals | 146 |
| Interaction | 147 |
| Applications to Pedagogy, Anthropology, etc. | 149 |
| Conclusion | 153 |
| The Instinctive Reactions of Young Chicks | 156 |
| A Note on the Psychology of Fishes | 169 |
| The Mental Life of the Monkeys | 172 |
| Introduction | 173 |
| Apparatus | 177 |
| Learning without Tuition | 182 |
| Tests with Mechanisms | 184 |
| Tests with Signals | 195 |
| Experiments on the Influence of Tuition | 209 |
| Introduction | 209 |
| Imitation of Human Beings | 211 |
| Imitation of Other Monkeys | 219 |
| Learning apart from Motor Impulses | 222 |
| General Mental Development of the Monkeys | 236 |
| Laws and Hypotheses of Behavior | 241 |
| The Evolution of the Human Intellect | 282 |