Thunder Bay, Canada
Thunder Bay, Canada

Lakehead University is a public research university with campuses in Thunder Bay and Orillia, Ontario, Canada. Lakehead University, shortened to 'Lakehead U', or 'LU', is non-denominational and provincially supported. It has undergraduate programs, graduate programs, the Bora Laskin Faculty of Law, and is home to the western campus of the Northern Ontario School of Medicine.The school has more than 45,000 alumni. The main campus in Thunder Bay has more than 7,900 students. As of September 2006, a new permanent extension campus in Orillia, located about 150 km north of Toronto, has more than 1,100 students. Wikipedia.

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PubMed | Lakehead University
Type: Journal Article | Journal: Clinical & experimental optometry | Year: 2016

Scores on many visual-cognitive tools are proposed as indicators of fitness-to-drive. A purported feature of some tools and one believed to be important is that they are age-independent. Specifically, scores are not correlated with age and poor scores represent a pathological process rather than normal aging. Yet, we know that several cognitive abilities are associated with age. One potential reason for the apparent age-independence of some tools is that focusing on older drivers leads to range restriction, a statistical issue that reduces the magnitude of correlations when values for one variable are restricted to a smaller range than naturally occurs. Hence, the purpose of this study was to investigate whether age is correlated with scores on visual-cognitive tests when we examine the full age range.We recruited 114 drivers aged 18 to 89years (mean: 42.3026.50years). Participants completed several visual-cognitive tools often used to examine fitness-to-drive (Trail Making Tests A and B, Attention Network Test and useful field of view).Correlations between age and test scores for drivers 65years and older only ranged from 0.03 to 0.48. With the whole age range, correlations ranged from 0.56 to 0.84. We also compared ordinary Pearson correlations among visual-cognitive tests scores to the corresponding partial correlations after removing the effect of age. Whereas ordinary Pearson correlations ranged from 0.40 to 0.69, partial correlations ranged from 0.01 to 0.30.Test scores may reflect age-associated normal biological changes. These results have implications for predicting fitness-to-drive among older drivers and suggest caution in using these scores.

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