title: ReadingMate: the effect of the content stabilizing technique, font size, and interline spacing on the letter-counting task performance of treadmill runners.
abstract: OBJECTIVE
  The aim of this study was to investigate the effects of font size, interline spacing, and a technology called ReadingMate on the letter-counting task performance of users running on a treadmill.
  
  
  BACKGROUND
  Few researchers have investigated how runners read text while running on a treadmill. Our previous studies showed that ReadingMate had positive effects on the reading-while-running experience; however, the effect of other text conditions (i.e., font size and interline spacing) and the interplay between ReadingMate and such text conditions on the letter-counting task performance are not clearly understood.
  
  
  METHODS
  Fifteen participants were recruited for the experiment. There were three main factors: display types (normal and ReadingMate), font sizes (8, 12, 16, and 20 point), and interline spacing (1.0x, 1.5x, 2.0x, and 2.5x). The researchers employed a letter-counting task. The performance was measured regarding task performance time, success rate of counting the target letter f and number of give-ups.
  
  
  RESULTS
  Overall, the letter-counting task performance while running on a treadmill improved as font size and interline spacing increased, as expected. ReadingMate was more effective than normal display particularly when text was displayed in a small font size and with dense interline spacing.
  
  
  CONCLUSIONS
  When text must be displayed in a small font size and with dense interline spacing, ReadingMate can be used to improve the users' task performance.
  
  
  CONCLUSIONS
  Practical applications of ReadingMate include improving the text-reading experience in shaky environments, such as in aviation, construction, and transportation.
authors.forename: Bum Chul
authors.initials: BC
authors.lastname: Kwon
authors.forename: Ji Soo
authors.initials: JS
authors.lastname: Yi
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhu
mesh_terms: D000293:Adolescent; D000328:Adult; D005080:Exercise Test / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D011932:Reading; D012420:Running; D013647:Task Performance and Analysis; D014584:User-Computer Interface; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult