nuijten2020 | R Documentation |
Data resulting from 131 meta-analyses, including 2443 effect sizes (fisher-z), on different areas of intelligence research \insertCitenuijten2020effectpsymetadata
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
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