Quality Assurance in Data Collection
This report describes the implementation of TIMSS and the analytic procedures underlying the reporting of the achievement results for the final year of secondary school assessment. Described in this volume are: the implementation of the sample design and characteristics of the national samples, calculation of sampling weights, procedures for estimating sampling variability, data management and database construction, procedures for checking the cognitive item-level data, the TIMSS scaling model, and the various procedures for reporting the achievement and background data.
The
entire Quality Assurance Report (1041 K)
The report is also available in smaller files, divided by chapter as listed below.
| CHAPTERS | CONTENT |
| Introduction and Acknowledgements | |
| Chapter 1 | |
| Chapter 2 | Sampling |
| Chapter 3 | Monitoring the TIMSS Data Collection |
| Chapter 4 | Observing The TIMSS Test Administration |
| Chapter 5 | Quality Control Steps for Free-Response Scoring |
| Chapter 6 | Data Consistency Across Countries |
| Appendix A | Examples of Item Information |
| Appendix B | Changes Made to the TIMSS International Database for the Population 2 Cognitive Items |
| Appendix C | TIMSS Sampling Forms |
| Appendix D | TIMSS Quality Control Monitors |
| Appendix E | Results of the Quality Assurance Monitors' Interviews with the National Research Coordinators |
| Appendix F | Results of the Quality Assurance Monitors' Test Session Observations |
| Appendix G | TIMSS International Coding Reliability Study Participants |
| Appendix H | Contingency Tables and Coding Guides for Items in the International Reliability Study |
| Appendix I | Data Cleaning and Consistency Checks |
