The OECD’s acceptance of Spain’s 2018 PISA data despite Catalonia’s disproportionate student exclusions raises serious concerns about data integrity and transparency. When a significant portion of students is omitted, particularly unevenly across regions, it risks biasing results and undermining the validity of comparisons both nationally and internationally.
Catalonia’s higher exclusion rate may mask underperformance or disparities by sidelining students facing challenges, such as those with learning difficulties or from marginalized backgrounds. This compromises the goal of PISA to provide a fair and comprehensive snapshot of student competencies.
Ignoring these irregularities may set a dangerous precedent that tolerates data inconsistencies for political convenience, especially in a country with territorial tensions like Spain. It also diminishes public trust in official education statistics, which are vital for informed policy and resource allocation.
Moving forward, there is a pressing need for the OECD and Spanish education authorities to enforce stricter oversight and harmonize exclusion criteria. Greater transparency and accountability will help ensure that PISA truly reflects student performance across all communities, thereby advancing equitable education reforms.