SSDforR (version 1.5.39)

GABttest: T-test for group data

Description

Computes t-test for group data. A bar graph showing the mean for each phase is displayed.

Usage

GABttest(behavior, phaseX, timeX, v1, v2)

Arguments

behavior

behavior variable

phaseX

phase variable

timeX

time variable (e.g., week)

v1

first phase letter between quotation marks (e.g., "A")

v2

second phase letter between quotation marks (e.g., "B")

Author

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. p104, p108

Go to www.ssdanalysis.com for more information.

Examples

attend<-c(0,0,0,1,0,0,1,0,0,1,0,0,1,0,1,0,0,0,0,0,1,1,0,0,1,NA,
0,1,1,0,1,1,0,1,1,1,0,1,0,0,1,1,1,1,0,0,1,1,0,1,0,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1)

week<-c(1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,5,5,5,5,5,NA,6,6,
6,6,6,7,7,7,7,7,
8,8,8,8,8,9,9,9,9,9,10,10,10,10,10,11,11,11,11,11,12,
12,12,12,12,13,
13,13,13,13,14,14,14,14,14,15,15,15,15,15)

pattend<-c("A","A","A","A","A","A","A","A","A","A","A","A","A","A",
"A","A","A","A","A","A","A","A",
"A","A","A",NA,"B","B","B","B","B","B","B","B","B","B","B",
"B","B","B","B","B","B","B",
"B","B","B","B","B","B","B","B","B","B","B","B","B","B",
"B","B","B","B","B","B","B","B","B","B","B","B","B","B"
,"B","B","B","B")
# now run GABttest(attend, pattend, week, "A", "B")