Estimating Reliability – Psychometrics
R-bloggers 2013-04-03
Summary:
# Each item has a item characteristic curve (ICC) of:PL3 = function(theta,a, b, c) c+(1-c)*exp(a*(theta-b))/(1+exp(a*(theta-b)))# Let's imagine we have a test with parameters a,b,cnitems = 50test.a = rnorm(nitems)*.2+1test.b = rnorm(nitems)test.c = run...