psychometric (version 2.4)

rbar: Sample size weighted mean correlation

Description

Computes the weighted mean correlation from a data object of the general format found in EnterMeta

Usage

rbar(x)

Value

Sample Weighted Average Correlation: uncorrected for artifacts other than sampling error

Arguments

x

A matrix or data.frame with columns Rxy and n: see EnterMeta

Author

Thomas D. Fletcher

Details

For a set of correlations for each study (i), rbar is computed as: sum(Ni*ri)/sum(Ni) where, Ni is the sample size of study i and ri is the correlation in study i.

References

Arthur, Jr., W., Bennett, Jr., W., and Huffcutt, A. I. (2001) Conducting Meta-analysis using SAS. Mahwah, NJ: Erlbaum.

Hunter, J.E. and Schmidt, F.L. (2004). Methods of meta-analysis: Correcting error and bias in research findings (2nd ed.). Thousand Oaks: Sage Publications.

Hunter, J.E., Schmidt, F.L., and Jackson, G.B. (1982). Meta-analysis: Cumulating research findings across studies. Beverly Hills: Sage Publications.

See Also

varr, rhoCA

Examples

# From Arthur et al
data(ABHt32)
rbar(ABHt32)
# From Hunter et al
data(HSJt35)
rbar(HSJt35)