sentences:  Gilbert's work has created much of the organizing framework upon which the International Society for Performance Improvement (ISPI) is based.The ISPI award the "Thomas F. Gilbert Distinguished Professional Achievement Award", previously called the "Outstanding Member and Distinguished Professional Achievement", that was renamed in 1996 in honor of Gilbert.Ogden Lindsley's memoriam to Gilbert appeared in ABAI's "The Behavior Analyst" in 1996.