replicationInterval (version 2.0.1)

ri.d: d-value (i.e., standardized mean difference) Replication Interval

Description

d-value (i.e., standardized mean difference) Replication Interval

Usage

ri.d(d, n1, n2, rep.n1 = NA, rep.n2 = NA, prob.level = 0.95)

Arguments

d

Original study: Sample d-value (standardized mean difference) created with pooled variance denominator. See formulas 4.18 and 4.19 (p.26) in Borenstein, Hedges, Higgins, & Rothstein (2009).

n1

Original study: Sample size for group 1

n2

Original study: Sample size for group 2

rep.n1

(optional) Replication study: Sample size for group 1. If not specified, n1 is used.

rep.n2

(optional) Replication study: Sample size for group 2. If not specified, n2 is used.

prob.level

(optional 0 to 1 value) Probability level desired (0 to 1). If not specified .95 (i.e., 95 percent) will be used.

Value

A list of values (lower.replication.interval.d, upper.replication.interval.d) containing the replication interval (and related statistics if requested with the extended.output argument).

References

Borenstein, M., Hedges, L. V., Higgins, J. P., & Rothstein, H. R. (2009). Introduction to meta-analysis. John Wiley & Sons. Cumming, G., & Finch, S. (2001). A primer on the understanding, use, and calculation of confidence intervals that are based on central and noncentral distributions. Educational and Psychological Measurement, 61(4), 532-574.

Examples

ri.d(d=.65,n1=50,n2=50,rep.n1=100,rep.n2=100)