Exploratory structural equation modeling, integrating CFA and EFA: Application to students' evaluations of university teaching HW Marsh, B Muthén, T Asparouhov, O Lüdtke, A Robitzsch, AJS Morin, ... Structural Equation Modeling 16 (3), 439-476, 2009 | 848 | 2009 |

The multilevel latent covariate model: A new, more reliable approach to group-level effects in contextual studies. O Lüdtke, HW Marsh, A Robitzsch, U Trautwein, T Asparouhov, B Muthén Psychological Methods 13 (3), 203-229, 2008 | 656 | 2008 |

Umgang mit fehlenden Werten in der psychologischen Forschung O Lüdtke, A Robitzsch, U Trautwein, O Köller Psychologische Rundschau 58 (2), 103-117, 2007 | 637 | 2007 |

Assessing the impact of learning environments: How to use student ratings of classroom or school characteristics in multilevel modeling O Lüdtke, A Robitzsch, U Trautwein, M Kunter Contemporary Educational Psychology 34 (2), 120-131, 2009 | 416 | 2009 |

Doubly-latent models of school contextual effects: Integrating multilevel and structural equation approaches to control measurement and sampling error HW Marsh, O Lüdtke, A Robitzsch, U Trautwein, T Asparouhov, B Muthén, ... Multivariate Behavioral Research 44 (6), 764-802, 2009 | 400 | 2009 |

Difficulties in solving context-based PISA mathematics tasks: An analysis of students' errors A Wijaya, M van den Heuvel-Panhuizen, M Doorman, A Robitzsch The Mathematics Enthusiast 11 (3), 555-584, 2014 | 244 | 2014 |

TAM: Test analysis modules A Robitzsch, T Kiefer, M Wu R Package, 0 | 228* | |

A 2× 2 taxonomy of multilevel latent contextual models: Accuracy–bias trade-offs in full and partial error correction models. O Lüdtke, HW Marsh, A Robitzsch, U Trautwein Psychological Methods 16 (4), 444-467, 2011 | 197 | 2011 |

sirt: Supplementary item response theory models A Robitzsch R Package, 0 | 90 | |

miceadds: Some additional multiple imputation functions, especially for ‘mice’ A Robitzsch, S Grund, T Henke R Package, 0 | 85* | |

The R package CDM for cognitive diagnosis models AC George, A Robitzsch, T Kiefer, J Groß, A Ünlü Journal of Statistical Software 74 (2), 1-24, 2016 | 84 | 2016 |

Multiple imputation of missing data for multilevel models: Simulations and recommendations S Grund, O Lüdtke, A Robitzsch Organizational Research Methods 21 (1), 111-149, 2018 | 78 | 2018 |

mitml: Tools for multiple imputation in multilevel modeling S Grund, A Robitzsch, O Luedtke R package version, 2018 | 77 | 2018 |

CDM: Cognitive diagnosis modeling A Robitzsch, T Kiefer, AC George, A Uenlue R Package, 0 | 77* | |

Effects of playing mathematics computer games on primary school students’ multiplicative reasoning ability M Bakker, M van den Heuvel-Panhuizen, A Robitzsch Contemporary Educational Psychology 40, 55-71, 2015 | 75 | 2015 |

Multiple imputation of missing data in multilevel designs: A comparison of different strategies. O Lüdtke, A Robitzsch, S Grund Psychological Methods 22 (1), 141-164, 2017 | 70 | 2017 |

Exploring factor model parameters across continuous variables with local structural equation models A Hildebrandt, O Lüdtke, A Robitzsch, C Sommer, O Wilhelm Multivariate Behavioral Research 51 (2-3), 257-278, 2016 | 65 | 2016 |

Complementary and competing factor analytic approaches for the investigation of measurement invariance A Hildebrandt, O Wilhelm, A Robitzsch Review of Psychology 16 (2), 87-102, 2009 | 62 | 2009 |

Special education students’ use of indirect addition in solving subtraction problems up to 100—A proof of the didactical potential of an ignored procedure M Peltenburg, M van den Heuvel-Panhuizen, A Robitzsch Educational Studies in Mathematics 79 (3), 351-369, 2012 | 61 | 2012 |

Effects of reading picture books on kindergartners’ mathematics performance M van den Heuvel-Panhuizen, I Elia, A Robitzsch Educational Psychology 36 (2), 323-346, 2016 | 59 | 2016 |