Can anyone explain me how can i calculate the ird in single case research when the most of the data points in the baseline are over than the data points in the treatment phase?
I have read the REICHOW's article with the method but in some cases i don't understand it..I don't understand how exactly we write a straight line across the data points to find the overlapped datas
I am more familiar with non-overlap measures of effect size, but hope these help!
Kim, D., An, Y., Shin, H. G., Lee, J., & Park, S. (2020). A meta-analysis of single-subject reading intervention studies for struggling readers: using Improvement Rate Difference (IRD). Heliyon, 6(11), e05024.
Parker, R. I., Vannest, K. J., & Brown, L. (2009). The improvement rate difference for single-case research. Exceptional Children, 75(2), 135-150.
Parker, R. I., Vannest, K. J., & Davis, J. L. (2011). Effect size in single-case research: A review of nine nonoverlap techniques. Behavior Modification, 35(4), 303-322.
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