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Field Test. As part of the development of each study, a field test is conducted to try out (a) all assessment and background questions and (b) the study's data collection operations, procedures, and equipment. Based on the results of the field test, questions that have problems are dropped or fixed and operational challenges are addressed in preparation for the main data collection.
Data Collection. The administration of each international assessment or survey is known as the main study data collection. Each study has its own required timeframe during which data must be collected to be internationally comparable.
Release of Results. After the administration of each international assessment or survey, all data are checked, compiled, and prepared for analyses (which includes deriving variables, creating indexes, and calculating weights and plausible values). Once these steps have been completed, analysis of the data is conducted and a report on the results prepared. This process typically takes 18 to 24 months from data collection to the release of international results.
| Season | 2019 | 2020 | 2021 |
|---|---|---|---|
| Spring |
TIMSS Data Collection
|
PIRLS Field Test
PIAAC Release of Results
TALIS Release of Results
IELS Release of Results
|
PIRLS Data Collection
|
| Summer |
TALIS Release of Results
|
PIAAC Field Test
|
|
| Fall |
ICILS Release of Results
PIAAC Release of Results
|
TIMSS Release of Results
PISA Field Test
PIAAC Field Test
|
PIAAC Data Collection
PISA Data Collection
|
| Winter |
PISA Release of Results
|
PIAAC Data Collection
|
Learn more about each study's schedule and plans:
- Spring 2017: PISA 2018 field trial
- Fall 2018: PISA 2018 main study data collection
- December 2019 (tentative): PISA 2018 reading, science, and mathematics data released
- May 2020 (tentative): PISA 2018 financial literacy data released
- Spring 2016: Data collection in schools across the United States
- Summer 2016: Data scoring and coding
- Fall 2016: Initial data submission to the IEA
- Winter 2016: Data review and cleaning
- Spring 2017: Data calibration, scaling, and weighting
- Summer 2017: Data review by participating countries
- December 2017: Data release
- March 2015: First meeting of the National Research Coordinators
- Ongoing in 2015: Framework and instrument development
- Spring 2016: Pilot of survey instruments in selected countries
- Fall 2016: Finalization of field trial instruments
- Spring 2017:Field trial data collection
- Fall 2017: Finalization of main survey instruments
- Spring 2018: Main survey data collection
- November 2019: International release
- May 2016: Pilot Study
- February 2017: Field Trial
- March - May 2018: Main Survey
- January - June 2019: Analysis and Reporting
- Spring 2017: TIMSS pilot data collection in schools across the United States
- Spring 2018: TIMSS field test data collection in schools across the United States
- Spring 2019: TIMSS 2019 main study data collection in schools across the United States
- Fall 2020: TIMSS 2019 data release
Cycle 1
- 2012: U.S. Round 1 Data Collection (including 23 other countries)
- 2014: U.S. Round 2 Data Collection (including 9 additional countries)
- 2017: U.S. Round 3 Data Collection
Cycle 2
- 2021: U.S. Data Collection (including more than 35 other countries)
The future schedule for U.S. PIAAC products is as follows:
- Fall 2019: U.S. PIAAC First Look Report
- Spring 2020: PIAAC U.S. Small Area Estimate Results