Klaas Sijtsma

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Klaas Sijtsma is affiliated with the following schools: Tilburg University, Vrije Universiteit Amsterdam, University of Twente, Utrecht University, University of Groningen

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Klaas Sijtsma

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Klaas Sijtsma

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Psychology
Mathematics

Klaas Sijtsma's Degrees

PhD Psychometrics University of Groningen
Masters Psychology University of Groningen
Bachelors Psychology University of Groningen

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Klaas Sijtsma's Published Works

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Published Works

On the Use, the Misuse, and the Very Limited Usefulness of Cronbach’s Alpha (2008) (2113)
Cognitive Assessment Models with Few Assumptions, and Connections with Nonparametric Item Response Theory (2001) (879)
Introduction to Nonparametric Item Response Theory (2002) (434)
Methodology Review: Evaluating Person Fit (2001) (378)
Examination of the Dimensionality of Fatigue (2004) (240)
Selection of Unidimensional Scales From a Multidimensional Item Bank in the Polytomous Mokken I RT Model (1995) (173)
Investigation and Treatment of Missing Item Scores in Test and Questionnaire Data (2003) (170)
Stochastic ordering using the latent trait and the sum score in polytomous IRT models (1997) (170)
Invited discussion of Cronbach (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16, 297-334 (26,889 citations in Google Scholar as of 1/1/2016) (2016) (167)
Influence of Imputation and EM Methods on Factor Analysis when Item Nonresponse in Questionnaire Data is Nonignorable (2000) (161)
Reliability Beyond Theory and Into Practice (2008) (157)
Big Five Personality Stability, Change, and Codevelopment Across Adolescence and Early Adulthood (2017) (148)
On the consistency of individual classification using short scales. (2007) (144)
Investigating an Invariant Item Ordering for Polytomously Scored Items (2010) (131)
On the Shortcomings of Shortened Tests: A Literature Review (2013) (128)
Reliability of test scores in nonparametric item response theory (1987) (126)
A tutorial on how to do a Mokken scale analysis on your test and questionnaire data. (2017) (124)
Theoretical and Empirical Comparison of the Mokken and the Rasch Approach to IRT (1990) (120)
Mokken scale analysis as time goes by: An update for scaling practitioners (2011) (117)
Learning potential assessment: Theoretical, methodological and practical issues (1993) (115)
A survey of theory and methods of invariant item ordering. (1996) (113)
MPS5 for Windows. A program for Mokken scale analysis for polytomous items (2000) (112)
Latent and Manifest Monotonicity in Item Response Models (2000) (111)
Psychometric properties of an instrument to measure the clinical learning environment (2007) (107)
A Comparative Study of Test Data Dimensionality Assessment Procedures Under Nonparametric IRT Models (2004) (103)
Nonparametric IRT analysis of Quality-of-Life Scales and its application to the World Health Organization Quality-of-Life Scale (WHOQOL-Bref) (2008) (101)
A Method for Investigating the Intersection of Item Response Functions in Mokken's Nonparametric IRT Model (1992) (100)
Methodology Review: Nonparametric IRT Approaches to the Analysis of Dichotomous Item Scores (1998) (100)
Detection of Aberrant Item Score Patterns: A Review of Recent Developments. Research Report 94-8. (1994) (99)
Nonparametric Item Response Theory in Action: An Overview of the Special Issue (2001) (99)
Cognitive Assessment Models with Few Assumptions , and Connections with Nonparametric IRT (2001) (96)
Mokken scale analysis for polychotomous items: theory, a computer program and an empirical application (1990) (92)
Detection and Validation of Unscalable Item Score Patterns Using Item Response Theory: An Illustration with Harter's Self-Perception Profile for Children (2008) (91)
Multiple Imputation of Item Scores in Test and Questionnaire Data, and Influence on Psychometric Results (2007) (90)
Comparison of Classical Test Theory and Item Response Theory in Individual Change Assessment (2016) (89)
The Dutch Review Process for Evaluating the Quality of Psychological Tests: History, Procedure, and Results (2010) (78)
Polytomous IRT models and monotone likelihood ratio of the total score (1996) (76)
9. Multiple Imputation of Incomplete Categorical Data Using Latent Class Analysis (2008) (74)
Rejoinder to "The Mokken Scale: A Critical Discussion" (1986) (74)
A Latent Class Approach to Estimating Test-Score Reliability (2011) (73)
Comparing Optimization Algorithms for Item Selection in Mokken Scale Analysis (2013) (73)
MSP5 for Windows User's Manual (2000) (71)
ITEM RESPONSE THEORY: PAST PERFORMANCE, PRESENT DEVELOPMENTS, AND FUTURE EXPECTATIONS (2006) (69)
Sample Size Requirements for Traditional and Regression-Based Norms (2016) (67)
Global, local, and graphical person-fit analysis using person-response functions. (2005) (66)
Playing with Data—Or How to Discourage Questionable Research Practices and Stimulate Researchers to Do Things Right (2016) (66)
Nonparametric polytomous IRT models for invariant item ordering, with results for parametric models (1998) (65)
Factor analysis of multidimensional polytomous item response data suffering from ignorable item nonresponse. (1999) (63)
New Developments in Categorical Data Analysis for the Social and Behavioral Sciences (2005) (62)
The person response function as a tool in person-fit research (2001) (59)
Influence of Test and Person Characteristics on Nonparametric Appropriateness Measurement (1994) (57)
A Comparative Study of the Dimensionality of the Self-Concealment Scale Using Principal Components Analysis and Mokken Scale Analysis (2008) (55)
A Taxonomy of IRT Models for Ordering Persons and Items Using Simple Sum Scores (2000) (54)
Incidence of Missing Item Scores in Personality Measurement, and Simple Item-Score Imputation (2010) (54)
Mokken Scale Analysis for Dichotomous Items Using Marginal Models (2007) (51)
Psychological measurement between physics and statistics (2012) (50)
Test Length and Decision Quality in Personnel Selection: When Is Short Too Short? (2012) (50)
On measurement properties of continuation ratio models (2001) (50)
Dimensionality of the Hospital Anxiety and Depression Scale (HADS) in Cardiac Patients (2012) (49)
Item-Score Reliability in Empirical-Data Sets and Its Relationship With Other Item Indices (2017) (47)
Future of Psychometrics: Ask What Psychometrics Can Do for Psychology (2012) (46)
Outliers in Questionnaire Data (2011) (46)
Minimum Sample Size Requirements for Mokken Scale Analysis (2014) (45)
Multiple imputation for item scores when test data are factorially complex. (2007) (42)
Two-way imputation: A Bayesian method for estimating missing scores in tests and questionnaires, and an accurate approximation (2007) (42)
Item-Score Reliability as a Selection Tool in Test Construction (2019) (41)
Testing Hypotheses About the Person-Response Function in Person-Fit Analysis (2004) (41)
Outlier Detection in Test and Questionnaire Data (2007) (41)
Correcting Fallacies in Validity, Reliability, and Classification (2009) (41)
Validation of the PHQ-15 for Somatoform Disorder in the Occupational Health Care Setting (2011) (40)
Advice on total-score reliability issues in psychosomatic measurement. (2011) (39)
Longitudinal associations between trait neuroticism and negative daily experiences in adolescence. (2020) (39)
Latent class regression analysis for describing cognitive developmental phenomena: An application to transitive reasoning (2004) (39)
Development and Individual Differences in Transitive Reasoning: A Fuzzy Trace Theory Approach. (2007) (38)
Is the Negative Association Between Self-Concealment and Subjective Well-Being Mediated by Mood Awareness? (2009) (38)
Screening for Psychopathy: Validation of the Psychopathic Personality Inventory-Short Form with Reference Scores (2013) (36)
Polytomous Latent Scales for the Investigation of the Ordering of Items (2011) (36)
Using Conditional Association to Identify Locally Independent Item Sets (2016) (35)
Methodological artifacts in dimensionality assessment of the hospital anxiety and depression scale (HADS). (2013) (35)
The Linear Logistic Test Model and heterogeneity of cognitive strategies (1989) (35)
Teaching inductive reasoning in primary education (2002) (34)
Introduction to the measurement of psychological attributes (2011) (34)
Shortening the S-STAI: consequences for research and clinical practice. (2013) (34)
Learning Potential Assessment (2020) (34)
MSP: A program for Mokken Scale analysis for Polytomous Items: Version 3.0: User's manual (1994) (30)
Statistic lz-Based Person-Fit Methods for Noncognitive Multiscale Measures (2014) (29)
Comparison of Four IRT Models When Analyzing Two Tests for Inductive Reasoning (2002) (28)
Conceptions of reliability revisited and practical recommendations. (2015) (28)
Mokken Scale Analysis: Theoretical Considerations and an Application to Transitivity Tasks (1992) (28)
The Role of Students’ Personality Characteristics, Self-Perceived Competence and Learning Conceptions in the Acquisition and Development of Social Communicative Competence: A Longitudinal Study (2006) (28)
Comparing Simulated and Theoretical Sampling Distributions of the U3 Person-Fit Statistic (2002) (28)
Contributions to Mokken's nonparametric item response theory (1988) (28)
An Ordinal Scale for Transitive Reasoning by Means of a Deductive Strategy (1999) (27)
Nonparametric item response theory and related topics (2007) (26)
Progress in NIRT analysis of polytomous item scores : Dilemmas and practical solutions (2001) (26)
The effect of missing data imputation on Mokken scale analysis (2005) (25)
Assessing Individual Change Using Short Tests and Questionnaires (2014) (25)
Methods for Estimating Item-Score Reliability (2018) (24)
Nonparametric item response theory for investigating dimensionality of marketing scales: A SERVQUAL application (2008) (24)
Detecting and Explaining Aberrant Responding to the Outcome Questionnaire–45 (2015) (22)
Reliability Estimation for Single Dichotomous Items Based on Mokken's IRT Model (1995) (22)
Psychometrics in Psychological Research: Role Model or Partner in Science? (2006) (22)
Knowledge of Solution Strategies and IRT Modeling of Items for Transitive Reasoning (1999) (21)
The study of crying: Some methodological considerations and a comparison of methods for analyzing questionnaires (2001) (21)
Construction and Validation of a Test for Inductive Reasoning (2003) (20)
Nonparametric item response theory and special topics (2007) (20)
An empirical study into the influence of customer satisfaction on customer revenues (2012) (18)
Measuring the ability of transitive reasoning, using product and strategy information (2004) (17)
Multi-method analysis of the internal structure of the Type D Scale-14 (DS14). (2012) (17)
Validation of the 4DSQ Somatization Subscale in the Occupational Health Care Setting as a Screener (2015) (17)
Improving the Conduct and Reporting of Statistical Analysis in Psychology (2016) (16)
Part II: On the Use, the Misuse, and the Very Limited Usefulness of Cronbach’s Alpha: Discussing Lower Bounds and Correlated Errors (2021) (16)
A Mokken Scale for Transitive Reasoning Suited for Longitudinal Research (1996) (16)
The effect of differential motivation on IRT linking (2015) (16)
A Review of Methods for Evaluating the Fit of Item Score Patterns on a Test. Research Report 99-01. (1999) (15)
Development and evaluation of a student-centred multimedia self-assessment instrument for social-communicative competence (2002) (15)
Psychometric Properties of the Bermond–Vorst Alexithymia Questionnaire (BVAQ) in the General Population and a Clinical Population (2018) (14)
How to develop a customer satisfaction scale with optimal construct validity (2014) (14)
Explanatory, Multilevel Person-Fit Analysis of Response Consistency on the Spielberger State-Trait Anxiety Inventory (2013) (14)
Review of Issues About Classical Change Scores: A Multilevel Modeling Perspective on Some Enduring Beliefs (2018) (13)
Alexithymia Has No Clinically Relevant Association With Outcome of Multimodal Treatment Tailored to Needs of Patients Suffering From Somatic Symptom and Related Disorders. A Clinical Prospective Study (2018) (13)
Person Fit in Order-Restricted Latent Class Models (2003) (13)
Standard Errors and Confidence Intervals of Norm Statistics for Educational and Psychological Tests (2017) (12)
DEVELOPMENTS IN MEASUREMENT OF PERSONS AND ITEMS BY MEANS OF ITEM RESPONSE MODELS (2001) (12)
Nonparametric item response theory (2004) (12)
A Guide for Sparse PCA: Model Comparison and Applications (2021) (12)
Latent Class Modeling of Phases in the Development of Transitive Reasoning (2007) (11)
Overestimation of Reliability by Guttman’s λ4, λ5, and λ6 and the Greatest Lower Bound (2016) (11)
Bayesian Estimation of Single-Test Reliability Coefficients (2021) (11)
MSP: A Computer Program for Item Analysis According to a Nonparametric IRT Approach (1989) (11)
Delimiting Coefficient α from Internal Consistency and Unidimensionality (2015) (10)
Fifty years of measurement and scaling in the Dutch social sciences (1996) (10)
Hierarchically Related Nonparametric IRT Models, and Practical Data Analysis Methods (2001) (10)
Testing Manifest Monotonicity Using Order-Constrained Statistical Inference (2013) (10)
Bias in Point Estimates and Standard Errors of Mokken’s Scalability Coefficients (2016) (10)
Evaluating Manifest Monotonicity Using Bayes Factors (2015) (10)
Using Confidence Intervals for Assessing Reliability of Real Tests (2019) (10)
Nonparametric item response theory models (2005) (10)
Discordancy Tests for Outlier Detection in Multi-Item Questionnaires (2013) (9)
A Flexible Latent Class Approach to Estimating Test‐Score Reliability (2014) (9)
On the Usefulness of a Multilevel Logistic Regression Approach to Person-Fit Analysis (2011) (9)
Response Inconsistency of Patient-Reported Symptoms as a Predictor of Discrepancy Between Patient and Clinician-Reported Depression Severity (2018) (9)
Adaptive Pairwise Comparison for Educational Measurement (2018) (8)
Possibilities and challenges in Mokken scale analysis using marginal models (2008) (8)
Positive Daily Experiences Are Associated with Personality Trait Changes in Middle–Aged Mothers (2018) (8)
Numerical Differences Between Guttman’s Reliability Coefficients and the GLB (2016) (8)
Detecting answer copying using alternate test forms and seat locations in small-scale examinations (2008) (7)
Theory Development as a Precursor for Test Validity (2013) (7)
Bias of factor loadings from questionnaire data with imputed scores (2005) (7)
Constructing a Transitive Reasoning Test for 6- to 13-Year-Old Children (2006) (7)
A causal theory of error scores. (2020) (6)
Measurement Models for Psychological Attributes (2020) (6)
Robust Mokken Scale Analysis by Means of the Forward Search Algorithm for Outlier Detection (2011) (6)
Standardized Protocol Items Recommendations for Observational Studies (SPIROS) for Observational Study Protocol Reporting Guidelines: Protocol for a Delphi Study (2020) (6)
22 Nonparametric Item Response Theory and Special Topics (2006) (6)
Big Five personality stability , change , and co-development across adolescence and early adulthood (2017) (6)
The Latent Variable Approach as Applied to Transitive Reasoning. (2012) (6)
Selecting a Data Collection Design for Linking in Educational Measurement: Taking Differential Motivation into Account (2015) (5)
Erratum to: Validation of the PHQ-15 for Somatoform Disorder in the Occupational Health Care Setting (2012) (5)
Invariant item ordering of transitive reasining tasks (1997) (5)
Nonparametric Statistical Methods (2010) (5)
Invariant Ordering of Item-Total Regressions (2011) (5)
Erratum to: Validation of the PHQ-15 for Somatoform Disorder in the Occupational Health Care Setting (2012) (4)
Advances in nonparametric item response theory for scale construction in quality-of-life research (2021) (4)
Identifying Person-Fit Latent Classes, and Explanation of Categorical and Continuous Person Misfit (2016) (4)
Developments in Practical Nonparametric IRT Scale Analysis (2003) (4)
Another note on the usefulness of Mokken scaling (1986) (4)
Separating models, ideas, and data to avoid a paradox: Rejoinder to Humphry (2013) (4)
Understanding Phoneme Segmentation Performance by Analyzing Abilities and Word Properties (2011) (4)
A tutorial on Bayesian single-test reliability analysis with JASP (2021) (4)
Goodness-of-Fit Methods for Nonparametric IRT Models (2015) (4)
Problem solving strategies and the Linear Logistic Test Model (1989) (3)
Misclassification Phenomena in Categorical Data Analysis : Regression toward the Mean and Tendency toward the Mode (2004) (3)
Longitudinal measurement invariance of the Dutch Outcome Questionnaire-45 in a clinical sample (2017) (3)
Statistical models for the development of psychological and educational tests (2008) (3)
Nonparametric Item Response Theory and Mokken Scale Analysis, with Relations to Latent Class Models and Cognitive Diagnostic Models (2019) (3)
Selection of Alzheimer symptom items with manifest monotonicity and manifest invariant item ordering (2008) (3)
Measuring cyber secure behavior of elementary and high school students in the Netherlands (2022) (2)
High-dimensional imputation for the social sciences: a comparison of state-of-the-art methods (2022) (2)
Review of the book Comparability of test scores for immigrants and majority group members in the Netherlands, J. te Nijenhuis, 1999 (1999) (2)
Modeling Differences in Test-Taking Motivation: Exploring the Usefulness of the Mixture Rasch Model and Person-Fit Statistics (2013) (2)
Commentaries on the Ten Most Highly Cited Psychometrika Articles from 1936 to the Present (2016) (2)
Estimating Difference-Score Reliability in Pretest–Posttest Settings (2021) (2)
The many issues in reliability research: choosing from a horn of plenty. (2015) (2)
Pairwise comparison using a Bayesian selection algorithm: Efficient holistic measurement (2021) (2)
Comparing Optimization Algorithms for Item Selection in Mokken Scale Analysis (2013) (2)
Reliability Estimation in Mokken’s Nonparametric Item Response Model (1988) (2)
Outlier detection in the medical Questionnaire Rising and Sitting Down (QR\&S) (2008) (2)
Reliability estimation for single dichotomous items (1994) (1)
Measurement Models for Psychological Attributes: Classical Test Theory, Factor Analysis, Item Response Theory, and Latent Class Models (2019) (1)
Psychometric Issues in Learning Potential Assessment (2020) (1)
R.W. LISSITZ (2009) The Concept of Validity. Revisions, New Directions, and Applications. (2010) (1)
The Monotone Homogeneity Model: Scalability Coefficients (2002) (1)
Precision and Sample Size Requirements for Regression-Based Norming Methods for Change Scores (2020) (1)
Classical and Modern Test Theory with an Eye toward Learning Potential Testing (2020) (1)
Review of the book Nonparametric unfolding models: A latent structure approach, W.J. Post, 1992, 9090049568 (1995) (1)
Response Theory Cognitive Assessment Models with Few Assumptions , and Connections with Nonparametric Item (2001) (1)
Classical test theory (2015) (1)
Validity of psychological questionnaires (2009) (0)
Rejoinder: The Future of Reliability (2021) (0)
Playing with Data—Or How to Discourage Questionable Research Practices and Stimulate Researchers to Do Things Right (2015) (0)
International Journal of Testing 2010 Reviewers (2011) (0)
Higher measurement quality of tests and questionnaires by means of more powerful statistics (2008) (0)
Standardized Protocol Items: Recommendations for Observational Studies (SPIROS) (2018) (0)
Item Response Theory (2022) (0)
An ordered latent class approach to nonparametric item response models (1998) (0)
The role of students' personality characteristics, self-perceived competence and learning conceptions in the acquisition and development of social communicative competence Bakx, (2006) (0)
Obituary for Ivo Molenaar (2018) (0)
On the Bias and Stability of the Results of Comparative Judgment (2021) (0)
Improving norms for psychological and educational tests (2013) (0)
Tilburg University Evaluating manifest monotonicity using Bayes factors (2015) (0)
Beyond Mokken scale analysis : Related results and recent developments (1998) (0)
Differential item functioning (DIF) under non parametric item response models (1998) (0)
Models and methods for invariant item ordering (2006) (0)
Measurement in the Social, Behavioral, and Health Sciences (2020) (0)
Steps toward preregistration of research on research integrity (2021) (0)
Book Reviews (2003) (0)
Acknowledgement of editorial consultants (2017) (0)
Books/Livres (2002) (0)
Steps toward preregistration of research on research integrity (2021) (0)
How to combine rules and commitment in fostering research integrity? (2023) (0)
Standardized Protocol Items Recommendations for Observational Studies (SPIROS) for Observational Study Protocol Reporting Guidelines: Protocol for a Delphi Study (Preprint) (2020) (0)
A PRACTICAL COMPARISON BETWEEN THE WEIGHTED AND THE UNWEIGHTED SCALABILITY COEFFICIENTS OF THE MOKKEN MODEL (2020) (0)
Latent Class Models and Cognitive Diagnostic Models (2020) (0)
The Monotone Homogeneity Model Applied to Transitive Reasoning Data (2002) (0)
Extension of Nonparametric IRT to Polytomous Item Scores (2002) (0)
Learning Potential Assessment Epilogue (2020) (0)
Social science measurement by means of item response models (2000) (0)
Review of Issues About Classical Change Scores: A Multilevel Modeling Perspective on Some Enduring Beliefs (2018) (0)
Models for Mental Measurement (2002) (0)
3 Hierarchically Related Nonparametric IRT Models , and Practical Data Analysis Methods ? (2001) (0)
Tilburg University Correcting fallacies in validity , reliability , and classification Sijtsma (2010) (0)
Reliability Estimation for Single Dichotomous Research Items Report 94-5 (2012) (0)
Parametric Item Response Theory and Structural Extensions (2020) (0)
International Journal of Testing 2013 Reviewers (2014) (0)
Obituary for Ivo Molenaar (2018) (0)
Item Analysis Using Nonparametric IRT for Polytomous Items (2002) (0)
Philosophy and Assumptions Underlying Nonparametric IRT Models for Dichotomous Item Scores (2002) (0)
Scale analysis using data that reflect the underlying response process (2001) (0)
Classical Test Theory and Factor Analysis (2020) (0)
Nonparametric Item Response Theory and Mokken Scale Analysis (2020) (0)
Standard Errors and Confidence Intervals of Norm Statistics for Educational and Psychological Tests (2016) (0)
The Total Workload Questionnaire (2000) (0)
Testing Manifest Monotonicity Using Order-Constrained Statistical Inference (2012) (0)
International Journal of Testing 2011 Reviewers (2012) (0)
A Test to Distinguish Monotone Homogeneity from Monotone Multifactor Models. (2023) (0)
International Journal of Testing 2009 Reviewers (2010) (0)
Screening for Psychopathy: Validation of the Psychopathic Personality Inventory-Short Form with Reference Scores (2012) (0)
Solving the"many variables"problem in MICE with principal component regression (2022) (0)
Minimal requirements of the reliability of tests and questionnaire (2008) (0)
Book reviews (1995) (0)
Is de peer review in crisis? : Welke crisis? (2017) (0)
Chapter 1 Statistical Models for Categorical Variables (2004) (0)
Modellen en methoden mbt invariante item ordening (2006) (0)
Selection of unidimensional tests from multidemensional item pools (1999) (0)
Tilburg University On the use , the misuse , and the very limited usefulness of Cronbach ' s alpha Sijtsma (2009) (0)
Improving the Conduct and Reporting of Statistical Analysis in Psychology (2015) (0)
How to develop a customer satisfaction scale with optimal construct validity (2013) (0)
Tilburg University Cognitive assessment models with few assumptions , and connections with nonparametric item response theory (2017) (0)
Getting it right with meta-analysis: Assessing heterogeneity and moderator effects in the presence of publication bias and p-hacking (2015) (0)
The Double Monotonicity Model (2002) (0)
Pairwise Comparison, Proximity, Response Time, and Network Models (2020) (0)
Tilburg University Development and individual differences in transitive reasoning (2007) (0)
Evaluating Manifest Monotonicity Using Bayes Factors (2015) (0)
Program of the 76th Annual and 17th International Meeting of the Psychometric Society (2011) (0)
Who needs psychometrics (2014) (0)
Tilburg University Introduction to the measurement of psychological attributes Sijtsma (2011) (0)
Future of Psychometrics: Ask What Psychometrics Can Do for Psychology (2011) (0)
Statistical models for categorical variables (2005) (0)
Tilburg University Outlier detection in test and questionnaire data (2008) (0)
Automated Item Selection Under the Monotone Homogeneity Model (2002) (0)
Person-misfit in item response models explained by means of nonparametric and multilevel logistic regression models (2007) (0)

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Klaas Sijtsma's Academic­Influence.com Rankings

Klaas Sijtsma's Degrees

Similar Degrees You Can Earn

Why Is Klaas Sijtsma Influential?

Klaas Sijtsma's Published Works

Published Works

What Schools Are Affiliated With Klaas Sijtsma?

Klaas Sijtsma's AcademicInfluence.com Rankings