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 Specialized technical reports

A Comparison of IRT Theta Estimates and Delta Scores From the Perspective of Additive Conjoint Measurement

 

The National Center for Assessment (NCA) is piloting an approach to scoring and equating of tests with binary items referred to as delta-scoring method (Dimitrov, 2015). The purpose of this study ... More  

Using a Multiple Indicators Multiple Causes (MIMIC) model to Examine Item and Scale Performance across Differe

 

TR164-2016 Abstract Item response latency has become a valuable source of information in modern psychometrics, especially after the increasing use of Computer Based Tests (CBT) in educational an ... More  

The Effects of Repeated Testing on Person Performance on the Computerized Version of the GAT and PGAT Tests

 

TR157-2016 Abstract The purpose of the present studies was to explore how subsequent testing influences examinee performance using the novel methodology of latent transition analysis. Participa ... More  

The Effects of Pretesting on Computer Based Testing Using the GAT

 

TR152-2016 Abstract The purpose of the present study was to explore how subsequent testing influences examinee performance using the novel methodology of latent transition analysis. Participant ... More  

Examining the prevalence and impact of non- attempted items in NCA educational tests

 

The aim of this study is to examine whether NCA achievement test scores are affected by response strategy decisions. The dataset consisted of the responses of 34,500 examinees to 52 verbal and 44 ... More  

Modeling Group Specific Differential Item Functioning in the STAPSOL Test

 

Fit to item response theory (IRT) models in educational testing can be compromised by the presence of group-specific differential item functioning (GDIF). The current study proposes methods to d ... More  

An Investigation of Dimensionality and Psychometric Properties of the Teacher Test- Mathematics

 

The Teacher Test-Mathematics (TT-M) is administered by the National Center for Assessment in Higher Education as a large-scale assessment tool for teacher certification. This study investigates t ... More  

Factorial Invariance and Latent Mean Differences of Scores on SAAT across Gender

 

This study examined the factorial structure of data on the Standard Achievement Admission Test (SAAT). SAAT has been administered by the National Center for Assessment in Higher Education (NCA) a ... More  

NEW TEACHER TEST: Factor Structure and Reliability

 

This study investigates the dimensionality and factor structure of data on the Teacher Test (TT) administered by the National Center for Assessment in Higher Education as an assessment tool for t ... More  

The Role of the Department of Study and Major on Teacher’s Knowledge and Attitudes

 

The purpose of the present study was to evaluate differences due to specialty on teacher’s attitudes, knowledge and skills. Participants were 44,692 teachers from various specialties who complete ... More  


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