“…This principle has proven successful over a range of tasks, including learning word lists (Hunkin et al, 1998a), person and object names Parkin et al, 1998;Evans et al, 2000), word processing skills (Hunkin et al, 1998a), semantic concepts (McKenna and Gerhand, 2002), word pair associations (Squires et al, 1997), and electronic diary programming . The general principles of errorless learning incorporate specific techniques for vanishing cues and spaced retrieval (Landauer and Bjork, 1978;Glisky et al, 1986;Glisky, 1992;Camp et al, 1993Camp et al, , 1996. In general, the method of vanishing cues involves the gradual addition and then reduction of cues across learning trials, whereas the spaced retrieval method requires the recall of the target item after short but gradually increased intervals.…”