Köhler rediscovered: The anti‐ringelmann effect

A current focus of research on individual versus group performance is social loafing, the decrease in individual effort that occurs when the individual works within a cooperative group rather than alone. This result is also referred to as the ‘Ringelmann effect’. But what has been ignored until now is the increment in group performance through systematic variation of individual performance rates within the group, although this effect was reported by Moede (1927) in the same article which influenced research on the Ringlemann effect. Within a narrow range of performance rates from 4.5 to 3.5 in dyads Kohler found an increase in group performance to a level above that of the individual performances. Kohler obtained comparable results from 3–person, and 4–person groups using the experimental procedure of weight lifting and winch turning. This phenomenon should be called the ‘Kohler effect’; although it is still to be replicated with modern ergometers.