The Mackworth Clock Test: A computerized version

The Mackworth Clock Test (MCT; N. H. Mackworth, 1948) was developed to eval uate vigilance in British Air Force radar technicians during World War II. Homemade versions of the MCT have since varied with respect to both the cha racteristics of the device and the procedures of its administration; This a rticle is a report on a computerized version of the MCT developed by the au thors to closely emulate Mackworth's test. MCT data were collected from 25 undergraduate students; their performance was found to be equivalent to Mac kworth's participants' data. This is the first MCT version that has been va lidated against the original.