orthogonal: 'orthogonal' creates interaction measurement items by using...

In seminr: Building and Estimating Structural Equation Models

orthogonal creates interaction measurement items by using the orthogonalized approach wherein

Description

This function automatically generates interaction measurement items for a PLS SEM using the orthogonalized approach..

Usage

# orthogonalization approach as per Henseler & Chin (2010):
 orthogonal(iv, moderator, weights)

Arguments

iv	The independent variable that is subject to moderation.
moderator	The moderator variable.
weights	is the relationship between the items and the interaction terms. This can be specified as correlation_weights or mode_A for correlation weights (Mode A) or as regression_weights or mode_B for regression weights (Mode B). Default is correlation weights.

Value

An un-evaluated function (promise) for estimating an orthogonal interaction effect.

References

Henseler & Chin (2010), A comparison of approaches for the analysis of interaction effects between latent variables using partial least squares path modeling. Structural Equation Modeling, 17(1),82-109.

Examples

data(mobi)

# seminr syntax for creating measurement model
mobi_mm <- constructs(
  composite("Image",        multi_items("IMAG", 1:5)),
  composite("Expectation",  multi_items("CUEX", 1:3)),
  composite("Value",        multi_items("PERV", 1:2)),
  composite("Satisfaction", multi_items("CUSA", 1:3)),
  interaction_term(iv = "Image", moderator = "Expectation", method = orthogonal),
  interaction_term(iv = "Image", moderator = "Value", method = orthogonal)
)

#  structural model: note that name of the interactions construct should be
#  the names of its two main constructs joined by a '*' in between.
mobi_sm <- relationships(
  paths(to = "Satisfaction",
        from = c("Image", "Expectation", "Value",
                 "Image*Expectation", "Image*Value"))
)

mobi_pls <- estimate_pls(mobi, mobi_mm, mobi_sm)
summary(mobi_pls)

seminr documentation built on Oct. 14, 2024, 1:07 a.m.