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During 0-s sessi<strong>on</strong>s, <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter gave an<br />

attenti<strong>on</strong>al cue, stated a task request (e.g.,<br />

“Make ______”), immediately provided <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

c<strong>on</strong>trolling prompt (i.e., a verbal/model<br />

prompt of <str<strong>on</strong>g>the</str<strong>on</strong>g> step to be completed), <strong>and</strong><br />

waited 5 s for a student resp<strong>on</strong>se. If a student<br />

initiated a resp<strong>on</strong>se, <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter allowed <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

student 20 s to complete <str<strong>on</strong>g>the</str<strong>on</strong>g> step. After <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

prompter provided c<strong>on</strong>sequences for each<br />

step <str<strong>on</strong>g>the</str<strong>on</strong>g> tutor waited 5 s for <str<strong>on</strong>g>the</str<strong>on</strong>g> student to<br />

initiate <str<strong>on</strong>g>the</str<strong>on</strong>g> next step in <str<strong>on</strong>g>the</str<strong>on</strong>g> task analysis.<br />

During 5-s sessi<strong>on</strong>s, <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter gave an<br />

attenti<strong>on</strong>al cue, stated a task request (e.g.,<br />

“Make <str<strong>on</strong>g>the</str<strong>on</strong>g> ______”), <strong>and</strong> waited 5 s for a student<br />

resp<strong>on</strong>se. If no resp<strong>on</strong>se occurred after<br />

5 s, <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter provided <str<strong>on</strong>g>the</str<strong>on</strong>g> c<strong>on</strong>trolling<br />

prompt <strong>and</strong> waited 5 s for <str<strong>on</strong>g>the</str<strong>on</strong>g> student to imitate<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> prompt. If <str<strong>on</strong>g>the</str<strong>on</strong>g> student initiated a<br />

resp<strong>on</strong>se within 5 s, <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter allowed <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

student 20 s to complete <str<strong>on</strong>g>the</str<strong>on</strong>g> resp<strong>on</strong>se. After<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> prompter provided <str<strong>on</strong>g>the</str<strong>on</strong>g> c<strong>on</strong>sequences, <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

tutor waited 5 s for <str<strong>on</strong>g>the</str<strong>on</strong>g> student to initiate <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

next step in <str<strong>on</strong>g>the</str<strong>on</strong>g> task analysis.<br />

The data collector recorded five possible<br />

resp<strong>on</strong>ses during training sessi<strong>on</strong>s. The data<br />

collector recorded a correct resp<strong>on</strong>se before<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> prompt (i.e., correct anticipati<strong>on</strong>) when a<br />

student initiated a resp<strong>on</strong>se before <str<strong>on</strong>g>the</str<strong>on</strong>g> c<strong>on</strong>trolling<br />

prompt <strong>and</strong> completed <str<strong>on</strong>g>the</str<strong>on</strong>g> step<br />

within 20 s. All correct anticipati<strong>on</strong>s resulted<br />

in specific verbal praise. The data collector<br />

recorded an incorrect resp<strong>on</strong>se before <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

prompt (i.e., n<strong>on</strong>-wait error) when a student<br />

initiated a resp<strong>on</strong>se before <str<strong>on</strong>g>the</str<strong>on</strong>g> prompt but<br />

completed <str<strong>on</strong>g>the</str<strong>on</strong>g> step (a) out of sequence (sequence<br />

error), (b) incorrectly (topographical<br />

error), or (c) with too l<strong>on</strong>g of a durati<strong>on</strong><br />

(durati<strong>on</strong> error). These errors resulted in <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

prompter interrupting <str<strong>on</strong>g>the</str<strong>on</strong>g> student, reminding<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> student to wait, <strong>and</strong> delivering <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

c<strong>on</strong>trolling prompt. When a student initiated<br />

a resp<strong>on</strong>se within 5 s after <str<strong>on</strong>g>the</str<strong>on</strong>g> delivery of <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

c<strong>on</strong>trolling prompt <strong>and</strong> completed <str<strong>on</strong>g>the</str<strong>on</strong>g> step<br />

within 20 s, <str<strong>on</strong>g>the</str<strong>on</strong>g> data collector recorded a correct<br />

after <str<strong>on</strong>g>the</str<strong>on</strong>g> prompt (i.e., correct wait).<br />

These resp<strong>on</strong>ses resulted in <str<strong>on</strong>g>the</str<strong>on</strong>g> trainer delivering<br />

verbal praise. The data collector recorded<br />

an incorrect after <str<strong>on</strong>g>the</str<strong>on</strong>g> prompt (i.e.,<br />

wait error) when a student initiated a resp<strong>on</strong>se<br />

within 5sof<str<strong>on</strong>g>the</str<strong>on</strong>g>prompter delivering<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> c<strong>on</strong>trolling prompt <strong>and</strong> completed <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

step (a) out of sequence (sequence error), (b)<br />

incorrectly (topographical error), or (c) with<br />

too l<strong>on</strong>g of a durati<strong>on</strong> (durati<strong>on</strong> error). When<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g>se errors occurred, <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter redelivered<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> c<strong>on</strong>trolling prompt <strong>and</strong> waited for a<br />

student resp<strong>on</strong>se. If <str<strong>on</strong>g>the</str<strong>on</strong>g> student still did not<br />

complete a correct resp<strong>on</strong>se, <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter<br />

notified <str<strong>on</strong>g>the</str<strong>on</strong>g> teacher. When a student did not<br />

initiate a resp<strong>on</strong>se within5sof<str<strong>on</strong>g>the</str<strong>on</strong>g>c<strong>on</strong>trolling<br />

prompt <str<strong>on</strong>g>the</str<strong>on</strong>g> data collector recorded a no resp<strong>on</strong>se,<br />

<strong>and</strong> <str<strong>on</strong>g>the</str<strong>on</strong>g> prompter delivered an additi<strong>on</strong>al<br />

attenti<strong>on</strong>al cue <strong>and</strong> prompt while completing<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> step for <str<strong>on</strong>g>the</str<strong>on</strong>g> student.<br />

At <str<strong>on</strong>g>the</str<strong>on</strong>g> end of each sessi<strong>on</strong>, <str<strong>on</strong>g>the</str<strong>on</strong>g> student ate<br />

<str<strong>on</strong>g>the</str<strong>on</strong>g> prepared food. Training sessi<strong>on</strong>s c<strong>on</strong>tinued<br />

until each student reached three sessi<strong>on</strong>s<br />

at 100% correct anticipati<strong>on</strong>s.<br />

Maintenance<br />

After criteri<strong>on</strong> was reached <strong>on</strong> each task, <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

teacher c<strong>on</strong>ducted maintenance sessi<strong>on</strong>s at<br />

least <strong>on</strong>ce every 15 sessi<strong>on</strong>s until all students<br />

reached criteri<strong>on</strong> <strong>on</strong> all cooking tasks. The<br />

trainer c<strong>on</strong>ducted <str<strong>on</strong>g>the</str<strong>on</strong>g>se sessi<strong>on</strong>s like 5-s delay<br />

sessi<strong>on</strong>s.<br />

Experimental Design<br />

We used a multiple probe across subjects <strong>and</strong><br />

behaviors design to dem<strong>on</strong>strate experimental<br />

c<strong>on</strong>trol. Experimental c<strong>on</strong>trol was dem<strong>on</strong>strated<br />

when a change occurred in <str<strong>on</strong>g>the</str<strong>on</strong>g> dependent<br />

variable when, <strong>and</strong> <strong>on</strong>ly when, <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

independent variable was applied <strong>and</strong> this<br />

change occurred across tiers in a time-lagged<br />

manner.<br />

Reliability<br />

116 / Educati<strong>on</strong> <strong>and</strong> Training in Developmental Disabilities-March 2008<br />

Peer tutor training. A general educati<strong>on</strong><br />

teacher collected procedural reliability data<br />

<strong>on</strong> <str<strong>on</strong>g>the</str<strong>on</strong>g> teacher’s implementati<strong>on</strong> of <str<strong>on</strong>g>the</str<strong>on</strong>g> peer<br />

tutor training procedure during 100% of <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

training sessi<strong>on</strong>s. The teacher calculated <str<strong>on</strong>g>the</str<strong>on</strong>g>se<br />

data by dividing <str<strong>on</strong>g>the</str<strong>on</strong>g> number of trainer behaviors<br />

observed by <str<strong>on</strong>g>the</str<strong>on</strong>g> number of trainer behavior<br />

planned <strong>and</strong> multiplying by 100 (Billingsley,<br />

White, & Muns<strong>on</strong>, 1980). Some of <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

trainer behaviors measured included providing<br />

definiti<strong>on</strong>s <strong>and</strong> examples of key terms,<br />

passing out materials, dem<strong>on</strong>strating <str<strong>on</strong>g>the</str<strong>on</strong>g> c<strong>on</strong>stant<br />

time delay procedure, having students<br />

role play, providing written examinati<strong>on</strong>s, <strong>and</strong><br />

providing feedback.

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