The Application of GA-BP Algorithm in 3PML Parameter Estimation

For IRT Model´s 3PLM parameter estimation, traditional statistical methods cannot solve the problems in the iterative process properly. In this paper, both BILOG algorithm and GA_BP algorithm was applied to a series of project parameters calculations to compare the two methods. The result shows that the application of GA_BP algorithm significantly reduced the initial iteration value required in traditional parameters estimation methods and markedly improved the precision and convergence ability of project parameters. Our investigation suggests GA_BP algorithm is a better method in parameter values estimation with wide applications and great research value.