nuijten2020: Data collected from meta-analyses on intelligence research
In psychmetadata: Open Datasets from Meta-Analyses in Psychology Research

Description Usage Format Source References

Data resulting from 131 meta-analyses, including 2443 effect sizes (fisher-z), on different areas of intelligence research \insertCitenuijten2020effectpsychmetadata

1	data(nuijten2020)

A dataset with 2443 rows and 14 variables.

study_id: Unique id for study
effect_id: Unique id for effect size
authors: identifier for the primary study within a meta-analysis based o the first author of the study or the sample used
year: year in which the primary study was reported
yi: original effect size converted to a Fishers z value
vi: variance around the z value in yi
ni: total sample size of the primary study
es: effect size as indicated in type_es
se: standard errors of the effect size
type_es: the type of effect size extracted from the meta-analysis; 1 = r transformed to Fishers z, 2 = Hedge's g, 3 = log odds ratio 4 = Cohen's d, 5 = Hazard Ratio, 6, 7, 8 = other
type: type of IQ research summarized by the meta-analysis; 1 = Correlational, 2 = Group_differences 3 = Experiments/Interventions, 4 = Toxicology, 5 = (Behavior) Genetics
citations: number of times the primary study was cited
countrycode: country in which the first author of a primary study was situated at the time of publication
jrnl_impact: impact factor in 2014 of the journal where the primary study was published
similarity: whether the primary study matched the research question of the meta-analysis; 0 = dissimilar, 1 = similar