Optimising repeated interceptive performance using contrasting visual textures in Olympic rowing: A case study

Abstract

Olympic rowing is underpinned by the need to cyclically apply force according to perceptually specified temporal constraints. Of importance is the “catch” where performers must match boat motion with oar placement at the start of each stroke. This study examined whether contrasting textures between the water and striped markings on the top hull surface of the boat could be exploited by rowers in order to improve performance. A single-subject ABACA design was adopted involving a female sculler of national standard. Rower-boat velocity matching was examined via changes in speed and a coupling value based on boat speed and oar angle. Treatment effects were examined both visually and via effect size. Set against Cohen’s (1992) criteria, sagittal lines had a large negative effect on speed ( d = -1.2) and a trivial effect on coupling values. Transverse lines showed a large beneficial effect on speed ( d = .82) and mixed results for coupling. Both treatments showed evidence of perturbed behaviour; but only transverse lines appeared to aid the perception of approach velocity as supported by changes in boat speed and coupling values. Results tentatively support the use of contrast textures to enhance the perception of critical movement couplings.