Donald B. Lindsley was born. Professor of psychology, physiology and psychiatry at University of California, Los Angeles (UCLA) and founder member of the world renowned Brain Research Institute at UCLA, Lindsley was one of the most influential physiological psychologists of the 20th century. Best known for his revolutionary neuroscientific studies on the reticular activating system, Lindsley also conducted groundbreaking research on the human electroencephalogram (EEG).

Donald Lindsley was elected to the National Academy of Sciences in 1952 and he received the American Psychological Association (APA) Distinguished Scientific Contribution Award in 1959.