IEA INSIDER 2025
Expanding Horizons: ISU’s Role in International Large-Scale Assessments
BY EVA FERON
In addition to conducting its own IEA studies, the International Studies Unit (ISU) collaborates on several international large-scale assessments as part of global consortia. For example, in cooperation with the Australian Council for Educational Research (ACER), ISU contributes to the OECD’s International Early Learning and Child Well-being Study (IELS) and leads the implementation of the Teaching and Learning International Survey (TALIS). Together with Educational Testing Service (ETS), ISU also supports the Programme for the International Assessment of Adult Competencies (PIAAC). Through these partnerships, ISU continues to expand its expertise and innovate in order to deliver high- quality outcomes.
INNOVATIONS IN TALIS 2024 The TALIS 2024 cycle introduces several important innovations. One of the key developments is a redesigned core survey that incorporates a rotated questionnaire format—meaning not all items are presented to all teachers. Following TALIS 2018, the TALIS Governing Board identified priority conceptual areas for expansion, while emphasizing the need to preserve trend measures and maintain a manageable response time. While multiple questionnaire forms had routinely been used during the pilot and field trial stages in the previous cycles, the 2024 cycle marks the first time this strategy is extended to the main data collection. IEA designed the teacher questionnaire to include three partially overlapping forms, structured around a fixed sequence of themes and sections, and aligned with three distinct analytical priorities: • High priority questions: these include socio- demographic items and other key outcomes (e.g., job satisfaction) relevant for both cross-sectional and trend analyses. They appear in all three forms. • Standard priority questions: these are included in two of the three forms to reduce response burden while maintaining coverage and statistical power for reporting. • Lower priority questions: these typically involve questions that do not require such high precision or the use of break-downs (e.g., situational judgement tasks). These appear in only one form.
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