About Rosetta Stone

Rosetta Stone is aimed at linking together assessments that have been administered in the recent past to build concordance tables that translate the scores resulting from national or regional assessments to scores on international assessments. It was piloted to link the 2019 regional assessments of ERCE and PASEC to TIMMS for mathematics and PIRLS for reading.

Rosetta Stone Study Implementation
The 2019 ERCE and PASEC assessments were administered to students in the sixth grade together with the Rosetta Stone linking booklets that contained items from the TIMSS and PIRLS assessments. The content of the ERCE and PASEC mathematics assessment was expected to align well with the TIMSS fourth grade assessments in numeracy and mathematics and the content of the ERCE and PASEC reading assessment was expected to align with the PIRLS fourth grade assessment in literacy and reading comprehension. The same students took their regional assessment (ERCE or PASEC) followed by TIMSS and PIRLS linking booklets in a separate session.

The Rosetta Stone study established concordance tables between TIMSS/PIRLS and ERCE, as well as between TIMSS/PIRLS and PASEC. The concordance tables allowed for the comparison of the ERCE and PASEC assessment results with TIMMS/PIRLS benchmarks and can be used to estimate proportions and can be used to estimate proportions of primary school students achieving international TIMSS and PIRLS proficiency levels.

Countries which participated in the Rosetta Stone Study:

  • ERCE (Colombia and Guatemala)
  • PASEC (Senegal, Guinea, and Burundi)


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