Children who were defiant would be given a time-out and separated from a group activity, with the expectation that the bad behavior would be its own punishment, and that any additional sanctions would not have a positive effect.
[1] He relocated to the University of Washington in 1948, where he applied Skinner's techniques on children at the Institute of Child Development, and wrote several textbooks in the field together with Donald Baer.
Ole Ivar Lovaas of the University of California, Los Angeles, one of the developers of applied behavior analysis therapy for autism, adapted Bijou's techniques to develop one of the most commonly used techniques of using rewards to enhance social skills of autistic children.
[1] In 1968, together with Donald Baer, Todd Risley, James Sherman, and Montrose Wolf, he established the Journal of Applied Behavior Analysis, as a peer-reviewed journal publishing research about experimental analysis of behavior and its practical applications.
[1] Bijou died at age 100 on June 11, 2009, after collapsing at his home in Santa Barbara, California.