Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Social Loafing01:37

Social Loafing

34.7K
Another way in which a group presence can affect performance is social loafing—the exertion of less effort by a person working together with a group. Social loafing occurs when our individual performance cannot be evaluated separately from the group. Thus, group performance declines on easy tasks (Karau & Williams, 1993). Essentially individual group members loaf and let other group members pick up the slack. Because each individual’s efforts cannot be evaluated,...
34.7K
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

7.9K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
7.9K
Social Proof00:52

Social Proof

27.6K
Social proof is a form of persuasion based on comparison and conformity. People compare their behavior and actions to what others are doing and will change to conform to do what their peers do.
27.6K
Sample Size Calculation01:19

Sample Size Calculation

3.2K
Knowledge of the sample size is the first requirement to conduct random sampling or an experiment. The sample size is the total number of units, observations, or groups (in some cases) used to get the data to estimate a population parameter. As the name suggests, the sample size is that of the sample drawn from the population and differs from the population size.
The sample size for the given experiment or sampling effort is fundamental to any study design. Sample size decides the number of...
3.2K
Statistical Significance01:50

Statistical Significance

20.1K
Once data is collected from both the experimental and the control groups, a statistical analysis is conducted to find out if there are meaningful differences between the two groups. A statistical analysis determines how likely any difference found is due to chance (and thus not meaningful). In psychology, group differences are considered meaningful, or significant, if the odds that these differences occurred by chance alone are 5 percent or less. Stated another way, if we repeated this...
20.1K
One-Way ANOVA: Equal Sample Sizes01:15

One-Way ANOVA: Equal Sample Sizes

3.2K
One-Way ANOVA can be performed on three or more samples with equal or unequal sample sizes. When one-way ANOVA is performed on two datasets with samples of equal sizes, it can be easily observed that the computed F statistic is highly sensitive to the sample mean.
Different sample means can result in different values for the variance estimate: variance between samples. This is because the variance between samples is calculated as the product of the sample size and the variance between the...
3.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Evolutionary lags in the primate brain size/body size relationship revisited.

PloS one·2026
Same author

Innate factors and ontogeny determine nonbreeding areas of migrant songbirds.

Science (New York, N.Y.)·2026
Same author

Religious rituals in the United Kingdom and Brazil are associated with increased social bonding and pain threshold.

Proceedings. Biological sciences·2026
Same author

Latent brain subtypes of chronotype reveal unique behavioral and health profiles across population cohorts.

Nature communications·2025
Same author

Unpacking social complexity.

The Behavioral and brain sciences·2025
Same author

The Placental Steroid Hypothesis of Human Brain Evolution.

Evolutionary anthropology·2025

Related Experiment Video

Updated: Jun 11, 2025

Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila
06:00

Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila

Published on: October 1, 2011

13.8K

Causal evidence for social group sizes from Wikipedia editing data.

M Burgess1, R I M Dunbar2

  • 1ChiTek-i AS, Oslo, Norway.

Royal Society Open Science
|October 3, 2024
PubMed
Summary

Human communities exhibit self-organization, with Wikipedia editing groups forming around two specific sizes: ~50 for high contention and ~150 for regular teams. These findings support social network theories and have implications for online platform governance.

Keywords:
collaborationgroup dynamicssocial groupstrustwikipedia

More Related Videos

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
07:41

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

7.4K
The HoneyComb Paradigm for Research on Collective Human Behavior
06:48

The HoneyComb Paradigm for Research on Collective Human Behavior

Published on: January 19, 2019

9.3K

Related Experiment Videos

Last Updated: Jun 11, 2025

Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila
06:00

Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila

Published on: October 1, 2011

13.8K
Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
07:41

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

7.4K
The HoneyComb Paradigm for Research on Collective Human Behavior
06:48

The HoneyComb Paradigm for Research on Collective Human Behavior

Published on: January 19, 2019

9.3K

Area of Science:

  • Social Network Analysis
  • Computational Social Science
  • Human Behavior

Background:

  • Human communities display self-organizing properties.
  • Dunbar's Number suggests cognitive limits on social relationships.
  • Online platforms like Wikipedia involve spontaneous group formation.

Purpose of the Study:

  • To analyze Wikipedia editing histories to identify emergent group sizes.
  • To investigate the self-organizing principles in human online communities.
  • To explore the implications for online platform governance and security.

Main Methods:

  • Analysis of Wikipedia editing histories across diverse subject pages.
  • Statistical analysis to identify peaks in transient group sizes.
  • Application of a bipartite trust model to derive a scaling law.

Main Results:

  • Identified two emergent peaks in transient group sizes: approximately 50 (maximal contention) and 150 (regular team).
  • Observed group sizes are consistent with conversational group sizes and Dunbar graph structures.
  • Derived a scaling law fitting the data, applicable to seeded group attraction processes.

Conclusions:

  • Spontaneous online communities of strangers demonstrate self-organizing properties.
  • Findings provide evidence for Dunbar Numbers in digital social structures.
  • Results have significant implications for Wikipedia governance and online social platform security.