Validity of score interpretations on an online English placement writing test

Abstract A much-debated question in the L2 assessment field is if computer familiarity should be considered a potential source of construct-irrelevant variance computer-based writing (CBW) tests. This study aims to make partial validity argument for an online source-based test (OSWT) designed English placement testing (EPT), focusing on explanation inference. Score interpretations OWST are proposed and supporting evidence sought terms test-takers’ self-confidence preferences CBW tests (two interrelated aspects familiarity) ability. Ninety-seven ESL students demonstrating two different levels (higher lower levels) ability studying at US university completed OSWT questionnaire asking about their attitudes towards series statistical thematic analyses revealed that most test-takers held reasons related previous experience (e.g., with CBW, useful tools/functions available computers) regardless The higher-level obtained significantly higher scores than lower-level counterparts. Test-takers’ were significant predictor only group. findings largely support score OSWT. Implications discussed fairness construct