Rust Advanced Numberical Reasoning Appraisal (RANRA)
This new and demanding measure is the result of a large study of both verbal and numerical skills undetaken recently in the UK. RANRA builds on and extends the critical thinking skills appraisal available through the Watson-Glaser.
RANRA is based on the Watson-Glaser model and measures mathematical abilities which have a clear relevance for managers and other decision makers in organisations.
Unlike many numerical reasoning tasks, RANRA uses Watson-Glaser style format design to examine higher level numerical skills involving deduction, interpretation and evaluation.
RANRA users benefit from extentive norms, shared with the popular Watson-Glaser Critical Thinking Appraisal (WGCTA).
Detailed outline of the RANRA measures
Comparison of quantities and sufficiency of information: the two numerical subtests place emphasis on analytical rather than straightforward computational skills, and items are mostly easily solved through application of higher level numerical reasoning skills, rather than rote calculation. Therefore, candidates who have internalised their mathematical knowledge at this level will be at an advantage.
The intuitive recognition of equivalence or sufficiency of information is a highly developed cognitive skill and only likely to be present in those who not only have the knowledge and ability, but also have regularly and successfully applied it. Taken together, recognition of equivalence and sufficiency can be the best predictors of future performance and skill acquisition in the use of numerical reasoning for problem solving in management settings
Co-norming
Both the Watson-Glaser and RANRA have been co-normed on a sample of 1546 respondents representative of the usage group in the working population. Co-norming and close association with WGCTA has produced a seamless and demanding appraisal of both higher level numerical and verbal reasoning skills. The high ceiling on both of the measures make WGCTA and RANRA worked together an ideal platform when recruiting in the management market.
T-scoring
The norms from this sample are used to transform the raw scores into T-scores (mean of 50, standard deviation of 10). These T-scores should be used as the common metric in assessing all scores on the both Watson-Glaser and RANRA and on the combined test. Thus, enabling assessors to compare candidates within and across roles.
Test timing
WGCTA and RANRA are tests of power rather than speed. Most people complete the Watson-Glaser within 50 minutes (approximately 10 minutes per sub-test), and complete RANRA within 30 minutes (approximately 15 minutes per sub-test). Evidence suggests that there is little benefit to be gained where respondents continue their endeavours beyond these times, thus, it is recommended that: Test administrators should allow 1 hour and 30 minutes for the combined test or where Watson-Glaser and RANRA are administered together. Where the tests are administered separately, test administrators should allow 1 hour for the Watson-Glaser, and 40 minutes for RANRA. The combined test and both the WGCTA and RANRA on-line tests are timed . The respondent is given the maximum time allowed. Once this time is reached, the test is automatically submitted for scoring. Administrators should be aware that there is little evidence to suggest that respondents who complete the test in less than the time allowed will outperform those that take the full time.
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