The Matrix Reasoning Item Bank (MaRs-IB): Novel, Open- Access Abstract Reasoning Items for Adolescents and Adults

Existing non-verbal ability tests are typically protected by copyright, preventingthem from being freely adapted or computerized. Working towards an openscience framework, we provide 80 novel, open-access abstract reasoning items,an online implementation, and item-level data from 659 participants agedbetween 11 and 33 years: the Matrix Reasoning Item Bank (“MaRs-IB”). EachMaRs-IB item consists of an incomplete matrix containing abstract shapes.Participants complete matrices by identifying relationships between the shapes.Our data demonstrate age differences in non-verbal reasoning accuracy, whichincreased during adolescence and stabilized in early adulthood. There was aslight linear increase in response times with age, resulting in a peak in efficiency(i.e., a measure combining speed and accuracy) in late adolescence. Overall, thedata suggests that the MaRs-IB is sensitive to developmental differences inreasoning accuracy. Further psychometric validation is recommended.