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etadd_47(3) - Division on Autism and Developmental Disabilities

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Figure 1. Total number of procedural errors (represented by bars) <strong>on</strong> the target items committed by students<br />

(number above bars) from experimental <strong>and</strong> comparis<strong>on</strong> group.<br />

group scored an average of 0 <strong>on</strong> the pretest<br />

<strong>and</strong> 10.20 <strong>on</strong> the posttest with a gain score of<br />

10.20. A comparis<strong>on</strong> of the gain scores between<br />

the comparis<strong>on</strong> <strong>and</strong> experimental<br />

group using an ANOVA indicated that the<br />

differences <strong>on</strong> both target (F [1, 8] 1289.29,<br />

p .001) <strong>and</strong> generalizati<strong>on</strong> items (F [1, 8] <br />

172.41, p .001) were statistically significant.<br />

In additi<strong>on</strong>, students from the experimental<br />

group answered an average of 16.80 target<br />

items <strong>and</strong> 7.60 generalizati<strong>on</strong> items correctly<br />

<strong>on</strong> the maintenance probe.<br />

We also analyzed the types of errors participants<br />

made <strong>on</strong> both target <strong>and</strong> generalizati<strong>on</strong><br />

items (see Figure 1 <strong>and</strong> 2). All five students in<br />

the comparis<strong>on</strong> group made procedural errors<br />

<strong>on</strong> the target <strong>and</strong> generalizati<strong>on</strong> items,<br />

accounting for 100% of the total errors <strong>on</strong> the<br />

pre- <strong>and</strong> posttest. Similar error patterns occurred<br />

<strong>on</strong> both types of items <strong>on</strong> the pretest<br />

by all five students in the experimental group,<br />

accounting for 98% <strong>and</strong> 100% of the total<br />

errors <strong>on</strong> the target <strong>and</strong> generalizati<strong>on</strong> items.<br />

During posttest, students in the experimental<br />

group did not have any procedural errors <strong>on</strong><br />

the target items <strong>and</strong> four of them had a procedural<br />

error <strong>on</strong> <strong>on</strong>e of the generalizati<strong>on</strong><br />

items. In additi<strong>on</strong>, four students from the<br />

experimental group completed the target<br />

items <strong>on</strong> the maintenance probe without mak-<br />

352 / Educati<strong>on</strong> <strong>and</strong> Training in <strong>Autism</strong> <strong>and</strong> <strong>Developmental</strong> <strong>Disabilities</strong>-September 2012

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