Download presentation
Presentation is loading. Please wait.
Published byHoward Bryan Modified over 6 years ago
1
Calculating Effect Sizes for Single Subject Designs
8.1 Calculating Effect Sizes for Single Subject Designs
2
Classes of Effect Size Formulae
Percentage of Non-Overlapping Data (PND) Identify the lowest baseline point Count the number of non-overlapping intervention points Calculate the proportion of non-overlapping to total number of intervention points (can’t use if baseline has a zero point)
3
PND = 8/10 = 80%
4
Classes of Effect Size Formulae
Standard Mean Difference Subtract the mean of the baseline phase from the mean of the intervention phase Divided by standard deviation of baseline
5
SMDall= 7.23 SMD3= 8.25
6
Classes of Effect Size Formulae
Percentage Reduction (mean baseline reduction) Subtract the average of last 3 Tx points from the average of the last 3 baseline points Divide by the average of the last 3 baseline points Multiply by 100 for percent of baseline reduction
7
MBR=339.00
8
Classes of Effect Size Formulae
Regression Models Regression equation obtained for baseline Regression equation obtained for Tx data Tx substracted from baseline and divided by standard deviation of baseline
9
Olive & Smith, 2005
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.