Using a Music Therapy Collaborative Consultative Approach - World ...

equally. The different effects of the interventions can be observed by comparing the
subject’s performance under each of the conditions. If a consistent difference in the trend
and/or level of data occurs, superiority of one treatment over another is demonstrated. The
advantage of this single-subject research design is the rapid comparison of the efficacy
between two interventions (Alberto & Troutman, 1995; Barlow & Hayes, 1979; Holcombe,
Wolery & Gast, 1994; Tawney & Gast, 1984 ). Because the child was leaving the childcare
program two months from the initiation of the study, this design allowed collecting data and
evaluating effects quickly.
In Experiment II, a Song intervention (Condition A) was compared to a Lyric
intervention (Condition B). The Conditions A (songs) and Condition B (lyrics) altered day
by day and were replicated over three tasks. The alternation of the treatment order replicated
across tasks was implemented to minimize any learning or order effects associated with
receiving the song intervention (Condition A) or lyric intervention (Condition B) first. The
treatment order for each task was as follow: Task #1 (hand-washing) A-B, Task #2 (toilet
training) B-A, and Task #3 (clean up) A-B. The Song Procedure (Conditions A), followed
the demands of the three selected multiple-step tasks by using songs. The Lyric Intervention
(Condition B), followed the demands of the three selected multiple-step tasks by using words
only. Data collection occurred over two months.
5.3.6 Measurements
In Experiment II, several measurement procedures and response definitions applied.
Essentially six categories of behaviors for each multiple step task were measured through
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