2016年4月8日 · Here we analyse a mobile phone dataset, firstly, to ascertain whether layers of friends can be identified based on call frequency. We then apply different clustering algorithms to break the call frequency of egos into clusters and compare the number of alters in each cluster with the layer size predicted by the social brain hypothesis.

2016年10月1日 · Recently these Dunbar layers have been observed in online social media, such as Facebook and Twitter (Dunbar et al., 2015) and an online computer game (Fuchs et al., 2014). These relationships are temporal, however, and the 150 in particular represents the amount of friends at a given time.

P Mac Carron, RIM Dunbar. Animal Behaviour 114, 119-128, 2016. 24: 2016: Viking sagas: Six degrees of Icelandic separation Social networks from the Viking era. P Mac Carron, R Kenna. Significance 10 (6), 12-17, 2013. 24: 2013: Trade-off between fertility and predation risk drives a geometric sequence in the pattern of group sizes in baboons.

Mac Carron, P., Kaski, K., & Dunbar, R. (2016). Calling Dunbar's numbers. Social Networks, 47, 151–155. https:// https://doi.org/10.1016/j.socnet.2016.06.003. Abstract. The social brain hypothesis predicts that humans have an average of about 150 relationships at any given time.

This influential number, ‘Dunbar's number’, originates from an extrapolation of a regression line describing the relationship between relative neocortex size and group size in primates. Here, we test if there is statistical support for this idea.

2021年5月5日 · This influential number, 'Dunbar's number', originates from an extrapolation of a regression line describing the relationship between relative neocortex size and group size in primates. Here, we...

2021年5月5日 · This influential number, ‘Dunbar's number’, originates from an extrapolation of a regression line describing the relationship between relative neocortex size and group size in primates. Here, we test if there is statistical support for this idea. Our analyses on complementary datasets using different methods yield wildly different numbers.

2021年5月4日 · We used the most recent compilation of primate group sizes by Dunbar, Mac Carron & Shultz (2018b) which tried to ensure that all group counts were for social groups (the local community of individuals who have broadly affiliative relationships in stable groups that share a common home range or territory).

Dunbar's number is the cognitive limit of an individual to maintain stable relationships with others in his network. It is based on the size of the neocortex of the human brain.

Fig. 1. On the left panel: The degree distribution and a log-normal fit. The inset shows users with degree k ≥ 100 and a similar fit. On the right panel: The weighted degree distribution is shown, again with a fitted log-normal distribution. - "Calling Dunbar's numbers"