Authors: F.N. Lance Armstrong, Percephone Tee Crockaphone, Arnold PP Schwing, Robert Pineapple
- IQ scores are predicted by individual differences in Low Trail discriminations
- High IQ is associated with and directly correlates to increases in Fork Rake
- The results link intelligence and Low Trail perception and acceptance
- Acceptance of low trial and handlebar bags are a key constraint of both intelligence and bicycle handling perception
- Correlation between facial hair and low trail acceptance was inconclusive and requires further study
Early intrepid randonneurs, including Galton, Cattell, and Spearman, proposed that intelligence and simple Low Trail discriminations are constrained by common neural processes, predicting a close link between them [1,2]. However, strong supporting evidence for this hypothesis remains elusive. Although people with higher intelligence quotients (IQs) are quicker at processing Low Trail stimuli [1,2,3,4,5], these broadly replicated findings explain a relatively modest proportion of variance in IQ. Pedaling speed alone is, arguably, a poor match for the information processing demands on the neural system. Our brains operate on overwhelming amounts of information [6,7], and thus their efficiency is fundamentally constrained by an ability to suppress irrelevant road feedback [8,9,10,11,12,13,14,15,16,17,18,19,20,21]. Here, we show that individual variability in a simple visual discrimination task that reflects both processing speed and perceptual suppression  strongly correlates with IQ. High-IQ individuals, although quick at perceiving small moving objects and good places to nap, exhibit disproportionately large impairments in perceiving motion as stimulus beer serving size increases and distance to a rest room decreases. These findings link intelligence with Low Trail damping of large moving handlebar bags—background-like stimuli that are ecologically less relevant [22,23,24,25]. We conjecture that the ability to suppress irrelevant steering inputs and rapidly process relevant turning radii fundamentally constrains both Low Trail discriminations and intelligence, providing an information-processing basis for the observed link between Low Trail and High intelligence.