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\n2025-08-01  \n2  \nContents  \n1 ACER ConQuest: An Introduction 11  \n1.1 What is ACER ConQuest? ........................... 11  \n1.2 What are the models that ACER ConQuest can fit? ............. 12  \n1.2.1 Rasch’s Simple Logistic Model ..................... 12  \n1.2.2 Rating Scale Model ........................... 12  \n1.2.3 Partial Credit Model . . . . . . . . . . . . . . . . . . . . . . . . . . 12  \n1.2.4 Ordered Partition Model . . . . . . . . . . . . . . . . . . . . . . . . 12  \n1.2.5 Linear Logistic Test Model . . . . . . . . . . . . . . . . . . . . . . 13  \n1.2.6 Multifaceted Models . . . . . . . . . . . . . . . . . . . . . . . . . . 13  \n1.2.7 Generalised Unidimensional Models . . . . . . . . . . . . . . . . . . 14  \n1.2.8 Multidimensional Item Response Models . . . . . . . . . . . . . . . 14  \n1.2.9 Latent Regression Models ....................... 15  \n1.3 How does ACER ConQuest fit these models? ................. 15  \n1.4 Some applications of ACER ConQuest .................... 15  \n1.4.1 Performing item analysis ........................ 15  \n1.4.2 Examining Differential Item Functioning ............... 16  \n1.4.3 Exploring Rater Effects ........................ 16  \n1.4.4 Estimating Latent Correlations and Testing Dimensionality .... 16  \n1.4.5 Drawing Plausible Values ....................... 16  \n1.5 Where to find more information . . . . . . . . . . . . . . . . . . . . . . . . 17  \n4 CONTENTS  \n1.6 Installing ACER ConQuest .......................... 17  \n1.6.1 Licence key instructions ........................ 17  \n2 An ACER ConQuest Tutorial 19  \n2.1 The ACER ConQuest User Interfaces ..................... 19  \n2.1. 1 GUI Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  \n2.1.2 Console Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27  \n2.1.3 Temporary Files ............................ 29  \n2.2 A Dichotomously Scored Multiple Choice Test ................ 29  \n2.2.1 Required files .............................. 30  \n2.2.2 Syntax .................................. 30  \n2.2.3 Running the Multiple Choice Sample Analysis ............ 36  \n2.2.4 Summary ................................ 41  \n2.3 Modelling Polytomously Scored Items with the Rating Scale and Partial Credit Models .................................. 47  \n2.3.1 a) Fitting the Partial Credit Model .................. 47  \n2.3.2 b) Partial Credit and Rating Scale Models: A Comparison of Fit . 60  \n2.3.3 Summary ................................ 67  \n2.4 The Analysis of Rater Effects ......................... 67  \n2.4.1 a) Fitting a Multifaceted Model .................... 70  \n2.4.2 b) The Multifaceted Analysis Restricted to One Criterion ..... 81  \n2.4.3 Summary ................................ 85  \n2.5 Many Facets and Hierarchical Model Testing ................. 85  \n2.5.1 a) Fitting a General Three-Faceted Model .............. 87  \n2.5.2 b) The Fit of Two Additional Alternative Models .......... 91  \n2.5.3 c) A Sequence of Models ........................ 96  \n2.5.4 Summary ................................ 97  \n2.6 Unidimensional Latent Regression ....................... 97  \nCONTENTS 5  \n2.6.1 a) A Latent Variable t-Test ...................... 99  \n2.6.2 b) Avoiding the Problem of Measurement Error ........... 108  \n2.6.3 c) Latent Multiple Regression ..................... 115  \n2.6.4 Summary ................................ 116  \n2.7 Differential Item Functioning ......................... 118  \n2.7.1 a) Examining Gender Differences in a Multiple Choice Test .... 118  \n2.7.2 b) Examining DIF When the Grouping Variable Is Polytomous .. 122  \n2.7.3 c) DIF for Polytomous Items ..................... 126  \n2.7.4 Summary ................................ 129  \n2.8 Multidimensional Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132  \n2.8.1 Example A: Fitting a Two-Dimensional Model ............","cbCaivPQwDdcnO0e","https://ap.wps.com/l/cbCaivPQwDdcnO0e","pdf",15720665,454,"English","# ACER ConQuest: An Introduction\n## What is ACER ConQuest?\n## What are the models that ACER ConQuest can fit?\n## How does ACER ConQuest fit these models?\n## Some applications of ACER ConQuest\n## Where to find more information\n# An ACER ConQuest Tutorial\n## The ACER ConQuest User Interfaces\n## A Dichotomously Scored Multiple Choice Test\n## Modelling Polytomously Scored Items with the Rating Scale and Partial Credit Models\n## The Analysis of Rater Effects","[{\"question\":\"What kinds of models does ACER ConQuest support?\",\"answer\":\"The manual lists multiple item response theory model families, including Rasch’s simple logistic model, rating scale, partial credit, ordered partition, linear logistic, multifaceted models, and multidimensional item response models, plus latent regression and other variants.\"},{\"question\":\"What applications does the manual describe for 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