In 1972, at the liberal Vassar College in New York, 18-year-old Rick Shenkman stood out for his unwavering support of Richard Nixon, especially as the Watergate scandal unfolded. His unconditional allegiance raises a perplexing question - why would a bright, well-educated student overlook the facts and maintain blind faith in the president?

In this episode, Matthew Syed delves into one of the most intriguing facets of human psychology - cognitive dissonance.

Conceptualised by Leon Festinger in the 1950s, cognitive dissonance refers to the mental discomfort a person experiences when they hold contradictory beliefs, values, or attitudes simultaneously, or when their behaviour conflicts with their beliefs or values. While we all encounter cognitive dissonance in our daily lives, its underlying mechanisms often remain unnoticed despite their profound impact.

Featuring journalist and historian Rick Shenkman, Professor Elliot Aronson, Professor Matt Johnson and Princeton University graduate student, Logan Pearce.

Presenter: Matthew SyedProducer: Julien Manuguerra-PattenSeries Editor: Katherine GodfreySound Design and Mix: Daniel KempsonTheme Tune by Ioana SelaruA Novel production for BBC Radio 4