| IRDbelow {SSDforR} | R Documentation |
Improvement Rate Difference (IRD) calculation
Description
This effect size function will compute the IRD and display a graph in the graph window. The desired improvemment is a decrease in the baseline behavior.
Usage
IRDbelow(behavior, phaseX, v1, v2)
Arguments
behavior |
behavior variable |
phaseX |
phase variable |
v1 |
first phase letter (e.g., "A") |
v2 |
second phase letter (e.g., "B") |
Author(s)
Charles Auerbach, PhD Wurzweiler School of Social Work Wendy Zeitlin, PhD Montclair State University
References
Auerbach, Charles, and Zeitlin Wendy. SSD for R: An R Package for Analyzing Single-Subject Data. Oxford University Press, 2014. p62-65, p136
Bloom, M., Fischer, J. & Orme, J.G. (2009). Evaluating practice: Guidelines for the accountable professional (6th ed.). New York: Pearson.
Parker, R. I., Vannest, K. J., & Brown, L. (2009). The improvement rate difference for single-case research. Exceptional Children, 75(2), 135-150. Go to www.ssdanalysis.com for more information.
Examples
cry<-c(3, 4, 2, 5, 3, 4, NA, 2, 2, 3, 2, 1, 2, NA, 2, 2, 1, 2, 1, 0, 0, 0)
pcry<-c("A", "A", "A", "A", "A", "A", NA, "B", "B", "B", "B", "B", "B",
NA, "B1", "B1", "B1", "B1", "B1", "B1", "B1", "B1")
#IQRbandgraph(cry,pcry,"A","week","amount","Crying")
IRDbelow(cry,pcry,"A","B")