I was listening to a podcast last year (Agnew, 2025), and the Ringelmann effect was mentioned. My ears pricked up: a new theory! This effect is named after some late 19th century agricultural engineering research (in the 1880s), which showed that, as team size increases, member contributions drop; or how "individual effort [decreases] when performing in groups as compared to when [members] perform alone" (Kravitz & Martin, 1986, p. 936, citing Latane et al., 1979, p. 822; Ringelmann, 1913). It is the first study of social loafing... sort of.
When studying how processes and group productivity relate, these human factors efficiency experiments showed that group members working together on a rope pull meant that each person could put in significantly less effort than when if they were working alone (Ringelmann, 1913; Kravitz & Martin, 1986)... which is entirely logical. We go from an individual maximum strain to being able to do things more safely, with shared responsibility. That to me is the power of numbers; the benefit of working together which allows us to minimise individual harm.
But. As we add more people to our group, the collective becomes less efficient: teams become less productive as they get bigger. There is a sweet spot for team size (Kravitz & Martin, 1986, after Ringelmann, 1913)... and this too is logical. If not everyone can get a grip on the rope, collective returns decrease. No surprises there, either, with Ringelmann noting "coordination loss" (according to Kravitz & Martin, 1986, p. 936). For the rope pull, more than 7 people was where coordination loss outweighed productivity for manual handling (Ringelmann, 1913).
And, if we have ever tried to co-ordinate a group meeting, we will all know that the larger a group is, the harder it is to get everyone aligned and free at the same time. In my experience - NB: I have no empirical evidence for this! - the sweet spot for co-ordinating a team is somewhere between three and five people.
However, I hesitate to say that Ringelmann's theory (1913) is about social loafing. My take on this is on optimisation: together we maximise collective safe physical effort, getting the job done without anyone busting a gut; until the group becomes too unwieldy to manage.
Sam
References:
Agnew, P. (2025, September). Why (often) you’re less effective in a team [Podcast]. Nudge. https://pod.link/1457621005/episode/ZjA3MzU2ZjQtOGUyNS0xMWYwLTk2ZmEtZjcyYjk0NzkzZjUx
Kravitz, D., & Martin, B. (1986). Ringelmann Rediscovered: The Original Article. Journal of Personality and Social Psychology, 50(5), 936-941. https://doi.org/10.1037/0022-3514.50.5.936
Ringelmann, M. (1913). Recherches sur les moteurs animés: Travail de l'homme [Research on animate sources of power: The work of man]. Annales de l'Institut National Agronomique, 2(12), 1-40. http://gallica.bnf.fr/ark:/12148/bpt6k54409695.image.f14.langEN
















