SSDforR (version 1.0)

CDC: Conservative Dual Criteria (CDC)

Description

The conservative dual-criteria (CDC) is a relatively new approach to comparing phases that works well when data have a moderate lag-1 autocorrelation (lower than 0.6). The CDC uses two lines to define the desired zone: the mean and the regression line of the comparison phase. If the desired outcome were an increase in the target behavior, then the desired zone would be above both lines. On the other hand, if lower scores were desirable, then the desired zone would be below both lines.

Usage

CDC(behavior, phaseX, v1, v2)

Arguments

behavior

behavior variable

phaseX

phase variable

v1

phase letter of first phase (assumes baseline) i.e. "A"

v2

phase letter of second phase i.e. "B"

References

Go to www.ssdanalysis.com

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")
CDC(cry,pcry,"A","B")