nuijten2020 {psymetadata}

Data collected from meta-analyses on intelligence research

Description

Data resulting from 131 meta-analyses, including 2443 effect sizes (fisher-z), on different areas of intelligence research (Nuijten et al. 2020)

Usage

data(nuijten2020)

Format

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

Source

https://osf.io/fq5wp/

References

Nuijten MB, van Assen MA, Augusteijn HE, Crompvoets EA, Wicherts JM (2020). “Effect sizes, power, and biases in intelligence research: A meta-meta-analysis.” Journal of Intelligence, 8(4), 36.