Question $1$

Step $1$:

Was the intervention effective for each

participant? Provide a rationale. Make sure that

you discuss the adequacy of the number of

data points in each phase, level, trend,

variability, consistency, immediacy of change,

overlap, basic effects, and functional

relationships for each Brandy

Phase $1$: Baseline

$44,40,38,20,24,22$

Phase $2$:

Intervention

$15,5,10,5,15,10,5$

Phase $3$: Withdrawal

$88,80,75,50,45,45,35,24$

Phase $4$:

$70,75,10,70,65,66$

Jack

Phase $1$: Baseline

$4,55,2,70,5,5,65,70,5$

Phase $2$: Intervention

$86,80,76,80,78,76,76,75,74,73,75$

Phase $3$: Withdrawal:

$10,15,10,20,15,15$

Phase $4$: Intervention

$95,93,94,91,90,89,91,94,95,93$

Bailey

Phase $1$: Baseline

$15,10,12,15,8,5,4$

Phase $2$: Intervention

$99,100,90,100,88,92,93$

Phase $3$: Withdrawal:

$22,25,24,18,17,20,25$

Phase $4$: Intervention

$89,94,90,100,89,96,97$

Stella

Phase $1$: Baseline

$65,70,68,74,72,75,80,85,88$

Phase $2$: Intervention

$75,78,74,80,85,80,80,84,83,82,$

Phase $3$: Withdrawal:

$14,12,9,33,20,25,33,36,43,47$

Phase $4$: Intervention

$99,95,100,95,100,90,95,100$participant.