Preface; 1. History, science, and psychology; 2. Ancient Greek science and psychology; 3. Rome and the medieval period; 4. The scientific revolution; 5. The Newtonian psychologists; 6. Physiology and psychology; 7. Theories of evolution; 8. Psychology in Germany; 9. Psychology in America: the early years; 10. Functionalism, behaviorism, and mental testing; 11. Neobehaviorism, radical behaviorism, and problems of behaviorism; 12. The cognitive revolution; 13. Abnormal and clinical psychology; Epilogue: the past and future of scientific psychology.