Langer, E. J. (1975). The illusion of control. Journal of Personality and Social Psychology, 32(2), 311-328.

Conducted a series of 6 studies involving 631 adults to elucidate the “illusion of control” phenomenon, defined as an expectancy of a personal success probability inappropriately higher than the objective probability would warrant. It was predicted that factors from skill situations (competition, choice, familiarity, involvement) introduced into chance situations would cause Ss to feel inappropriately confident. In Study 1 Ss cut cards against either a confident or a nervous competitor; in Study 2 lottery participants were or were not given a choice of ticket; in Study 3 lottery participants were or were not given a choice of either familiar or unfamiliar lottery tickets; in Study 4, Ss in a novel chance game either had or did not have practice and responded either by themselves or by proxy; in Study 5 lottery participants at a racetrack were asked their confidence at different times; finally, in Study 6 lottery participants either received a single 3-digit ticket or 1 digit on each of 3 days. Indicators of confidence in all 6 studies supported the prediction.

 

 

http://dx.doi.org/10.1037/0022-3514.32.2.311