In April 2020, TRA began the Twins Research Australia COVID-19 Knowledge, Experience, Reaction, and Resilience study (TRACKERR). The TRACKERR study consists of a series of surveys aimed at investigating the short, medium and long-term impacts of the COVID-19 pandemic on Australian families. Different surveys will be created for adult twins, junior twins and parents of junior twins, and they will be rolled out in a series of "phases" over the course of the pandemic.

We have now completed three phases of the adult version of the TRACKERR study. Phase 1 collected responses from the 15th of April to the 23rd of July 2020. Phase 2 collected responses from the 14th of August to the 20th of October 2020. Phase 3 collected responses from the 31st of March to the 31st of May 2021. Nearly 4,000 individuals participated in the Phase 1 survey, nearly 3,000 in the Phase 2 survey and approximately 2,500 completed Phase 3 (Phase 3 was only sent to responders of Phase 1 or 2). Approximately 350 twin pairs participated in all 3 phases. A summary of Phase 1 findings was released early in 2020.

Additionally, we have completed the first phase of our parents of twins and triplets TRACKERR survey, which was run from the 12th of May to the 9th of July 2020. A preliminary synopsis of these results is now available in this infographic. A second phase survey of parents of twins and triplets is currently in development and will focus on the longer-term impact of COVID-19 restrictions on parents and families.

If you are interested in accessing this data please contact TRA's research liason and coordinator at This email address is being protected from spambots. You need JavaScript enabled to view it..

Documents available for download:

Phase 1 (adult twins) reference document 

Phase 1 (adult twins) data dictionary

Phase 2 (adult twins) reference document 

Phase 2 (adult twins) data dictionary

Phase 3 (adult twins) reference document 

Phase 3 (adult twins) data dictionary

Phase 1 (parents of twins and triplets) reference document 

Phase 1 (parents of twins and triplets) data dictionary



Twins Research Australia

Address: 3/207 Bouverie St
Carlton, Vic 3010


ABN: 84 002 705 224

Twins Research Australia has received continuous funding from the National Health and Medical Research Council (NHMRC) since 1981, most recently through a Centre of Research Excellence Grant (2015-2022). TRA is administered by the University of Melbourne.

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