Description Usage Arguments Details Value References Examples
View source: R/nonoverlapmeasures.R
Calculates the percentage of nonoverlapping data index (Scruggs, Mastropieri, & Castro, 1987).
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A_data 
vector of numeric data for A phase. Missing values are dropped. 
B_data 
vector of numeric data for B phase. Missing values are dropped. 
condition 
vector identifying the treatment condition for each observation in the series. 
outcome 
vector of outcome data for the entire series. 
baseline_phase 
character string specifying which value of

improvement 
character string indicating direction of improvement. Default is "increase". 
For an outcome where increase is desirable, PND is calculated as the proportion of observations in the B phase that exceed the highest observation from the A phase. For an outcome where decrease is desirable, PND is the proportion of observations in the B phase that are less than the lowest observation from the A phase. The range of PND is [0,1].
Numeric value
Scruggs, T. E., Mastropieri, M. A., & Casto, G. (1987). The quantitative synthesis of singlesubject research: Methodology and validation. Remedial and Special Education, 8(2), 24–43. doi:doi: 10.1177/074193258700800206
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