compare_smd {TOSTER}R Documentation

Comparing SMDs between independent studies

Description

A function to compare standardized mean differences (SMDs) between studies. This function is intended to be used to compare the compatibility of original studies with replication studies (lower p-values indicating lower compatibility)

Usage

compare_smd(
  smd1,
  n1,
  se1 = NULL,
  smd2,
  n2,
  se2 = NULL,
  paired = FALSE,
  alternative = c("two.sided", "less", "greater", "equivalence", "minimal.effect"),
  null = 0,
  TOST = FALSE
)

Arguments

smd1, smd2

SMDs from study 1 & 2, respectively.

n1, n2

sample size(s) from study 1 & 2, respectively (can be 1 number or vector of 2 numbers).

se1, se2

User supplied standard errors (SEs). This will override the internal calculations.

paired

a logical indicating whether the SMD is from a paired or independent samples design. If a one-sample design, then paired must be set to TRUE.

alternative

a character string specifying the alternative hypothesis, must be one of "two.sided" (default), "greater", "less", "equivalence" (TOST), or "minimal.effect" (TOST). You can specify just the initial letter.

null

a number indicating the null hypothesis. For TOST, this would be equivalence bound.

TOST

Defunct: use alternative argument. Logical indicator (default = FALSE) to perform two one-sided tests of equivalence (TOST).

Details

This function tests for differences between correlations.

Value

A list with class "htest" containing the following components:

"statistic"

z-score

"p.value"

numeric scalar containing the p-value for the test under the null hypothesis.

"estimate"

difference in SMD between studies

"null.value"

the specified hypothesized value for the null hypothesis.

"alternative"

character string indicating the alternative hypothesis (the value of the input argument alternative). Possible values are "greater", "less", or "two-sided".

"method"

Type of SMD

"data.name"

"Summary Statistics" to denote summary statistics were utilized to obtain results.

"smd"

SMDs input for the function.

"sample_sizes"

Sample sizes input for the function.

"call"

the matched call.

See Also

Other compare studies: boot_compare_smd()


[Package TOSTER version 0.7.1 Index]