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Piaac Numeracy Task Complexity Schema: Factors That Impact On Item Difficulty, Dave Tout, Iddo Gal, Mieke Van Groenestijn, Myrna Manly, Mary Jane Schmitt

Transition and Post-School Education and Training

This paper describes some lessons learned from international adult numeracy assessments that can help in understanding the challenges that people, including both adults and school students, have when solving numeracy tasks and their levels of performance on functional mathematical problems. The paper presents a theoretical schema of five factors that predict, separately and in interaction, the complexity or level of difficulty of mathematically-related assessment tasks, including tasks that incorporate texts and require literacy or reading skills, which are very common in adults' lives. The model was originally developed as part of the development of the Adult Literacy and LifeSkills survey …