Differential Aptitude Test: Numerical Ability (DAT; Pearson, 2008) measures understanding of numerical relationships and facility in handling numerical operations. The test focuses on computation rather than reasoning. Numerical ability scores are used to predict success in positions that require the ability to accurately compute and calculate numbers.
DAT Numerical Ability is a maths test intended for entry- level positions and NDIT is a numerical reasoning test suited for graduate to higher level positions in which numerical data interpretation is important. DAT: Numerical Sequence (Pearson, in press) measures pattern recognition in numbers using computer adaptive testing. The Numerical Sequence test will be available for purchase in the U.S. in 2017. NDIT and Numerical Sequence are moderately correlated (r=.39, n=104 working adults).
Rust Advanced Numerical Reasoning Assessment (RANRA; Rust, 2007) measures numerical reasoning by assessing the ability to compare quantities and recognise the sufficiency of numerical information to make decisions. RANRA has been described as a test of ‘critical thinking ability with numbers’. RANRA has a high correlation with the Watson-Glaser Critical Thinking Appraisal® (.68) while NDIT has a moderate correlation with critical thinking (.47). NDIT expands on RANRA and offers more work-relevant items in an item-banked format allowing for unproctored testing. The two numerical reasoning tests show a high correlation (r=.64).