The most salient question when considering most-to-least vs least-to-most is the degree to which making errors is likely to negatively impact learning.
Three prompt levels are required as a minimum for the least-to-most prompting technique (independent, intermediate, and controlling prompt). There is no restriction on the number of levels that can be employed, but in practice, no more than five levels are useful. When using most-to-least prompting, a vocal and physical prompt would be given first.
As the student did the behavior effectively, the physical prompt would diminish. Verbal and gestural prompts would be given after the physical prompt had gone. The least obtrusive sort of cue is thought to be verbal. While less intrusive than model prompts, gesture prompts are more intrusive than verbal prompts. Most to least prompting involves a teacher covering the student's mouth with his or her hands.
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