ICAR60: ICAR 60 Data

In maid: Meta-Analysis of Individual Differences

ICAR 60 Data

Description

Aggregated data from some subsamples of the ICAR 60 intelligence test.

Usage

data("ICAR60")

Format

A data frame with 7 observations on the following 7 variables.

subsample

a factor with levels CollegeDegree, CurrentInUniv, GradOrProDegree, HSgrad, InGradOrProSchool, less12yrs and SomeCollege.

N

a numeric vector. The size of the subsamples.

test_length

a numeric vector. The number of dichotomous items answered by each testee (16 in all subsamples).

obsmean

a numeric vector. Observed mean.

obssd

a numeric vector. Observed standard deviation.

alpha

a numeric vector. The values of Cronbach's alpha calculated from the complete data before aggregation.

gradSample

a factor with levels yes and no. A yes indicates that the subsample consists of graduates.

Details

This dataset has been compiled from raw test data by exluding persons who answered less than 16 items and then calculating the means, standard deviations and Cronbach alpha values for each subset.

Source

The original dataset has been made available by David M. Condon and can be obtained from Harvard Dataverse (\Sexpr[results=rd]{tools:::Rd_expr_doi("10.7910/DVN/AD9RVY")}). Also see https://icar-project.com/.

References

Condon, D., & Revelle, W. (2014). “The international cognitive ability resource: development and initial validation of a public-domain measure”. Intelligence, 43, 52–64.

maid documentation built on March 31, 2023, 3:07 p.m.