# ------------------------------------------------------
# Online Stats Training
# Lavaan: how to get started
# Exercise 2 - Multiple regression in lavaan
# By Rens van de Schoot, Utrecht University
# ------------------------------------------------------

# ---------------------------------
# Exercise 2a - Installing lavaan
# ---------------------------------

install.packages("mnormt")
install.packages("pbivnorm")
install.packages("lavaan")
library(lavaan)


# -----------------------------------
# Exercise 2b - Multiple Regression
# -----------------------------------

# Define model specifications
model  <- 'sd ~ overt + covert' 

# Store regression model to object "fit" 
fit <- sem(model, data = popular) 

# Inspect regression results 
summary(fit, fit.measures = TRUE)