metahdep (version 1.30.0)

gloss: gloss: Data from the JEBS glossing paper

Description

This includes the following four objects:

gloss.Table1

a data.frame containing the contents of Table 1 in the paper

(sample sizes, sample means, sample SDs, and covariate information from each study)

gloss.X

a matrix representing the design matrix X for the meta-analysis in the paper

gloss.theta

a vector, representing the effect size estimates as summarized in Table 3 of the paper

gloss.V

a matrix, representing the covariance matrix of effect size estimates, including

sampling dependence in off-diagonal elements, as summarized in Table 3 of paper

Usage

data(gloss)

Format

This object contains the four objects described above.

Details

This data set summarizes 13 experiments with 18 study reports, all involving the effect of native-language (L1) vocabulary aids on second language (L2) reading comprehension. Some experiments produced multiple study reports, creating a dependence structure among the resulting effect size estimates.

The intended use for these data is to demonstrate the methods coded in the metahdep package.

References

Stevens J.R. and Taylor A.M. (2009), Hierarchical Dependence in Meta-Analysis, Journal of Educational and Behavioral Statistics, 34(1):46-73.

See also the metahdep package vignette.

Examples

data(gloss)
# Look at Table 1
gloss.Table1