Evidence for Reliable Individual Differences in Intra-Individual Variability

In reliability theory, the deviations in an individual's performance from his own mean score are referred to as error and the assumption is made that error scores in a series of repeated tests will be uncorrected. To test this assumption, 24 college males were given 175 RT trials a day for 5 days (the first day served as a warm-up session and was not used in the analyses). Within each test day, a short rest period was given following every block...