37 studies from a meta-analysis of social comparison as a behavior change technique by Hoppen et al. (2025)

The data set contains Cohen's d effect sizes, variances, and study characteristics including outcome type, feedback level, social comparison type, number of sessions, sample type, sample size, and country. The meta-analysis examined social comparison as a behavior change technique across the behavioral sciences (Hoppen et al. 2025) .

Usage

Hoppen2025

Format

A data.frame with 9 columns and 37 observations:

d

Cohen's d effect size.

v

Sampling variance of d.

outcome

Outcome type.

feedback_level

Feedback level.

social_comparison_type

Social-comparison type.

sessions

Number of sessions.

sample_type

Sample type.

sample_size

Sample size.

country

Country.

References

Hoppen TH, Cuno RM, Nelson J, Lemmel F, Schlechter P, Morina N (2025). “Meta-analysis of randomized controlled trials examining social comparison as a behaviour change technique across the behavioural sciences.” Nature Human Behaviour, 9(8), 1595–1612. doi:10.1038/s41562-025-02209-2 .