title: Reliability of a computer-based system for measuring visual performance skills.
abstract: BACKGROUND
  Athletes have demonstrated better visual abilities than nonathletes. A vision assessment for an athlete should include methods to evaluate the quality of visual performance skills in the most appropriate, accurate, and repeatable manner. This study determines the reliability of the visual performance measures assessed with a computer-based system, known as the Nike Sensory Station.
  
  
  METHODS
  One hundred twenty-five subjects (56 men, 69 women), age 18 to 30, completed Phase I of the study. Subjects attended 2 sessions, separated by at least 1 week, in which identical protocols were followed. Subjects completed the following assessments: Visual Clarity, Contrast Sensitivity, Depth Perception, Near-Far Quickness, Target Capture, Perception Span, Eye-Hand Coordination, Go/No Go, and Reaction Time. An additional 36 subjects (20 men, 16 women), age 22 to 35, completed Phase II of the study involving modifications to the equipment, instructions, and protocols from Phase I.
  
  
  RESULTS
  Results show no significant change in performance over time on assessments of Visual Clarity, Contrast Sensitivity, Depth Perception, Target Capture, Perception Span, and Reaction Time. Performance did improve over time for Near-Far Quickness, Eye-Hand Coordination, and Go/No Go.
  
  
  CONCLUSIONS
  The results of this study show that many of the Nike Sensory Station assessments show repeatability and no learning effect over time. The measures that did improve across sessions show an expected learning effect caused by the motor response characteristics being measured.
authors.affiliation: Pacific University College of Optometry, Forest Grove, Oregon, USA. ericksog@pacificu.edu
authors.forename: Graham B
authors.initials: GB
authors.lastname: Erickson
authors.forename: Karl
authors.initials: K
authors.lastname: Citek
authors.forename: Michelle
authors.initials: M
authors.lastname: Cove
authors.forename: Jennifer
authors.initials: J
authors.lastname: Wilczek
authors.forename: Carolyn
authors.initials: C
authors.lastname: Linster
authors.forename: Brendon
authors.initials: B
authors.lastname: Bjarnason
authors.forename: Nathan
authors.initials: N
authors.lastname: Langemo
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology*; D003867:Depth Perception / Q000502:physiology*; D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*; D012016:Reference Values; D015203:Reproducibility of Results; D015348:Vision, Binocular / Q000502:physiology*; D055815:Young Adult