Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"ability estimation"”.
-
Ability Estimation Under Different Item Parameterization and Scoring Models
… threshold configuration, and prior ability distribution on the accuracy of ability estimation given various IRT models. Item response data on 30 items from 1,000 examinees was simulated using known item parameters and ability estimates. The item response data sets were submitted to …
-
Impact of Ignoring Nested Data Structures on Ability Estimation
… impact of multilevel data structures on subject ability which are random effect predictions known as empirical Bayes estimates in the one-parameter IRT / Rasch model. The literature on the impact of complex survey design on latent trait models is mixed and there is no "best practice" established …
-
Effect of Multidimensional Ability Differences Across Groups of Examinees on Unidimensional Ability Estimation
… (1999) have demonstrated that the unidimensional ability composite of a multidimensional test to be a standardized linear combination of multiple abilities. Both simulated test data and real ACT test data were used to investigate the effect on unidimensional ability estimates of a group of …
-
Theory and applications of nonparametric regression in item response theory
The simultaneous and nonparametric estimation of latent abilities and item characteristic curves is considered. In particular, the joint asymptotic properties of ordinal ability estimation and kernel smoothed nonparametric item characteristic curve estimation is investigated under relatively …
-
Controlling item exposure for response time-informed item selection in computerized adaptive testing
… of fixed length while maintaining efficiency of ability estimation. However, this also resulted in an extremely skewed distribution of item exposure rates. To counter this issue, they recommended the use of the a-stratification with b-blocking (ASB) method, which balanced item exposure very well …
-
On-the-fly assembled multistage adaptive testing
… implementing MST as it could mitigate the underestimation or overestimation problems faced by CAT. Although the MST is able to alleviate the problems faced by CAT, its preassembled modules and panels do not target each examinee as well as CAT. The other serious drawback of MST is that the …
-
Item selection methods in multidimensional computerized adaptive testing adopting polytomously-scored items under multidimensional generalized partial credit model
… DPMIX. In general, D-optimality shows the best estimation accuracy and conditional estimation accuracy. D-optimality, MI, and CEM are similar in terms of ability estimation accuracy and tendency in selecting items when the item bank size is large. For both dichotomous and polytomous items, KI is …
-
Comparison of three scoring procedures within context-dependent item sets
… estimates. However, the degree of inflated reliability for different scoring techniques has not been observed. This study scored three context-dependent item sets as stand-alone items and as separate item sets using three different scoring techniques; number-right, polyweighting and the …
-
Extension of the item pocket method allowing for response review and revision to a computerized adaptive test using the generalized partial credit model
… due in part to the increased use and availability of personal computers, but also partly due to the benefits of CATs. CATs provide increased measurement precision of ability estimates while decreasing the demand on examinees with shorter tests. This is accomplished by tailoring the test to …
-
Comparing Elo, Glicko, IRT, and Bayesian IRT Statistical Models for Educational and Gaming Data
… models used for estimating skill or ability levels often vary by field, however their underlying mathematical models can be very similar. Differences in the underlying models can be due to the need to accommodate data with different underlying formats and structure. As the models from …
-
Student-Group Item Parameter Drift Impact on Individual and Aggregate Observed Scores
… item parameter drift in previous research— on abilityestimates and proficiency classification accuracy when occurring in the discrimination parameterof a 2-PL item response theory (IRT) model. Using Monte Carlo simulation, several factors weremanipulated and examined for impact including (1) …
-
Effective cognitive diagnostic assessment with computerized adaptive testing
… classified according to the specific attributes (ability, skills, and knowledge) that the examinees possess. There are numerous models for cognitive diagnostic assessment. A higher-order latent trait model was used in the study. This model takes into account the local dependencies of the …
-
Advancements in test security: preventive test assembly methods and change-point detection of compromised items in adaptive testing
… test with minimal decrease in the accuracy of ability estimation. As this method also resulted in extremely unbalanced exposure of items, however, a-stratification with b-blocking was recommended as a means for counterbalancing. Although exceptionally effective in this regard, it comes at …