subscore.s | R Documentation |
This function estimate true subscores based on observed subscores, using the method introduced by Haberman (2008) <doi:10.3102/1076998607302636>.
subscore.s(test.data)
test.data |
A list that contains item responses of all subtests and the entire test, which can be obtained using function 'data.prep'. |
summary |
Summary of obtained subscores (e.g., mean, sd). |
PRMSE |
PRMSEs of obtained subscores (for Haberman's methods only). |
subscore.original |
Original subscores and total score. |
subscore.s |
Subscores that are estimated based on the observed subscore. |
Haberman, S. J. (2008). "When can subscores have value?." Journal of Educational and Behavioral Statistics, 33(2), 204-229. doi:10.3102/1076998607302636.
# Transferring scored response data to the required list format test.data<-data.prep(scored.data,c(3,15,15,20), c("Algebra","Geometry","Measurement", "Math")) # Estimate true subscores using Haberman's method based on observed subscores subscore.s(test.data) subscore.s(test.data)$summary subscore.s(test.data)$Correlation subscore.s(test.data)$Disattenuated.correlation subscore.s(test.data)$PRMSE subscore.s(test.data)$subscore.s
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