boot_compare_smd {TOSTER}R Documentation

Comparing SMDs between independent studies with Bootstrapping

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

boot_compare_smd(
  x1,
  y1 = NULL,
  x2,
  y2 = NULL,
  null = 0,
  paired = FALSE,
  alternative = c("two.sided", "less", "greater"),
  R = 1999,
  alpha = 0.05
)

Arguments

x1

a (non-empty) numeric vector of data values from study 1.

y1

an optional (non-empty) numeric vector of data values from study 1.

x2

a (non-empty) numeric vector of data values from study 2.

y2

an optional (non-empty) numeric vector of data values from study 2.

null

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

paired

a logical indicating whether the SMD is from a paired or independent samples design.

alternative

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

R

number of bootstrap replicates

alpha

alpha level (default = 0.05)

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

"conf.int"

percentile (bootstrap) confidence interval for difference in SMDs

"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"

"Boostrapped" to denote summary statistics were utilized to obtain results.

"smd"

SMDs input for the function.

"df_ci"

Data frame of confidence intervals.

"boot_res"

List of bootstrapped results.

"call"

the matched call.

See Also

Other compare studies: compare_smd()


[Package TOSTER version 0.7.1 Index]