Estimating overall Theta of one candidate

[AYESHA JAVED]

How can I estimate overall Theta of one candidate given value of difficulty,discrimination,guessing and responses  any formula of theta estimation on R studio

plz anyone help about how to calculate  overall theta using 3pl 

[Hugo Harada]

Almost the same code as before. See last line.

Hugo

-------------------------------------

if(!require(mirt)) install.packages("mirt"); library(mirt)
LSAT #data
parameters <- mirt( data=LSAT,
                             model=1,
                             itemtype='3PL',
                             pars="values"
                             )

parameters[parameters$name == "a1", ]$value <- c(0.6,0.7,0.8,0.9,1.0)  
parameters[parameters$name == "a1", ]$est <- FALSE    
parameters[parameters$name == "d", ]$value <- c(-0.6*-1,-0.7*1,-0.8*2,-0.9*-.5,-1.0*.26)  
parameters[parameters$name == "d", ]$est <- FALSE    
parameters[parameters$name == "g", ]$value <- c(0.2,0.23,.3,0.12,0.16)  
parameters[parameters$name == "g", ]$est <- FALSE    

mod <- mirt( data=LSAT,
                    model=1,
                    itemtype='3PL',
                    pars=parameters
)

coef(mod,simplify=TRUE,IRTpars = TRUE)
fscores(mod)
fscores(mod, response.pattern=c(1,1,0,1,0)) # for one pattern.

Em dom., 4 de jul. de 2021 às 17:54, AYESHA JAVED <aj78...@gmail.com> escreveu:

How can I estimate overall Theta of one candidate given value of difficulty,discrimination,guessing and responses  any formula of theta estimation on R studio

plz anyone help about how to calculate  overall theta using 3pl 

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	Hugo Harada Sócio-fundador - COO Adaptativa Inteligência Educacional S.A. Cel: (11) 96345-0390 Rua Claudio Soares, 72 - Sala 411Pinheiros, CEP 05422-030, São Paulo - SP  http://www.adaptativa.com.br

[AYESHA JAVED]

Thanks a lot. 

[AYESHA JAVED]

I AYESHA I WANT TO TAKE HELP IN THE PACKAGE IRT_PARAMETER_ESTIMATION PLURALSIGHT HERE IS THE LINK

https://github.com/pluralsight/irt_parameter_estimation/blob/master/irt_parameter_estimation/baker_mle.py

PROBLEM:- kindly help me that in bakers.mle.py file what is the formate used to enter the data in theta,r anf f and how i can run the full def function of 3pl mle

Here is the data which i want to pass to 3pl mle function kindly guide me that error is shown

ERROR

WHEN I PASS THE DATA IN THIS FORM THEN DOESNT SHOW ANY THING AFTER ITERATION 0 MSG

RESULT NOTHING

KINDLY GUIDE METHAT HOW CAN I ESTIMATE THE ABILITY OF SINGLE CANDIDATE BY PASSING THE DATASET ON 3PL FUNCTION DATASET

[Phil Chalmers]

No clue what this is, so sorry I'm afraid this might be the wrong forum to ask code-related questions for that python package. I'm sure it can be done in mirt though, provided that you can describe what exactly you are trying to do.

Phil

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[AYESHA JAVED]

Ok, thanks.