Daniel M. Wegner, a pioneering social psychologist who helped to reveal the mysteries of human experience through his work on thought suppression, conscious will, and mind perception, died July 5 as a result of amyotrophic lateral sclerosis (ALS). He was 65.

The John Lindsley Professor of Psychology in Memory of William James, Wegner redefined social psychology as the science of human experience. He was arguably most famous for his experiments on thought suppression, in which people were unable to keep from thinking of a white bear.

Wegner also broke ground in other areas of social psychology, including transactive memory (how memories are distributed across groups and relationship partners) and action identification (what people think they are doing). He had also explored the experience of conscious will, and most recently focused on mind perception (how people perceive human and nonhuman minds).

“Dan was, I believe, the most original thinker in modern psychology,” said Dan Gilbert, the Edgar Pierce Professor of Psychology, who knew Wegner for three decades. “Most of us work on problems that are important in our field, and we use theories others have invented to make progress. Dan didn’t make progress — Dan made new highways, new roads. He opened doors in walls that we didn’t know had doors in them, and he did this over and over.”

Gilbert said he was privileged to call Wegner one of his closest friends. The two met while they both worked in Texas — Gilbert at the University of Texas and Wegner at Trinity University.

“Being among the few social psychologists in Texas, we were introduced by a mutual friend, and it was love at first sight,” Gilbert said. “We’ve been true friends ever since.” He added. “I’m heartbroken to lose my friend of 30 years, but I guess the only thing worse would have been not to have a friend of 30 years.”

While Wegner was known for his pioneering work on the mind, Gilbert said his intellectual curiosity seemed never to rest.

“The thing about Dan is he didn’t take the lab coat off,” Gilbert said. “For him, being a psychologist wasn’t a job, it was a way of being. He simply spent all his waking time thinking about the interesting aspects of the mind. It was 24/7 for him.”

That intellectual heft, however, never masked Wegner’s humor.

“Dan Wegner was the funniest human being I’ve ever known, and everybody else was a distant second,” Gilbert said. “To say someone was funny may sound frivolous, but I would make the claim that Dan understood something important, which is that humor is the place where intelligence and joy meet. Dan understood that … humor is where a brilliant mind tickles itself.”

That sense of humor, Gilbert said, often showed up in Wegner’s writing, and helped transform the way social psychology is described in many journals today. “If you open a psychology journal now,” he said, “many, many people write in a Wegner-esque style.”

Even in his final days, Gilbert said, Wegner’s restless mind faced the challenge of his death with an inspirational degree of curiosity.

“It was a privilege to sit by his side as he took this journey to the end,” Gilbert said. “About a month ago, I asked him, ‘If you had to think of one word to describe this experience, what would it be?’ He looked at me, and he said ‘fascinating.’ He was a student of the human experience, and he was having an experience unlike most of us ever have. And rather than bemoaning it or crying about it, he took it as another fascinating thing to study and learn about and think about.”

Born in Calgary, Alberta, Canada, Wegner studied as an undergraduate and graduate student at Michigan State University, earning his Ph.D. in 1974. He was appointed an assistant professor and rose to full professor and chair of the psychology department at Trinity in San Antonio.

Wegner joined the faculty in the psychology department at the University of Virginia in 1990, where he was the William R. Kenan Jr. Professor of Psychology before joining the Harvard faculty in 2000.

Wegner was the author of four academic books, an introductory psychology textbook, and nearly 150 journal articles and book chapters.

Wegner’s research was funded by the National Science Foundation and the National Institute of Mental Health. In 1996-1997 he was a fellow at the Center for Advanced Study in the Behavioral Sciences, and in 2011 was inducted as a fellow of the American Academy of Arts and Sciences. He received many of the top honors in his field, including the William James Fellow Award from the Association for Psychological Science, the Distinguished Scientific Contribution Award from the American Psychological Association, the Distinguished Scientist Award from the Society of Experimental Social Psychology, and the Donald T. Campbell Award from the Society for Personality and Social Psychology.

Wegner is survived by his wife of 29 years, Toni Giuliano Wegner of Winchester, and his daughters, Kelsey Wegner Hurlburt of Dunkirk, Md., and Haley Wegner of Winchester. At Wegner’s request, his body was donated to the Massachusetts General Hospital’s Neurological Clinical Research Institute for ALS Research.

A memorial service will be held at 4 p.m. on Saturday at the Winchester Unitarian Society, 478 Main St., Winchester, Mass. Wegner requested that his service be a celebration of life, and so would welcome Hawaiian shirts.

In lieu of flowers, donations can be made to:

Compassionate Care ALS

P.O. Box 1052

West Falmouth, Mass. 02574

Winchester Unitarian Society

478 Main Street

Winchester, Mass. 01890

