Description Usage Arguments Details Value References Examples
View source: R/non-overlap-measures.R
Calculates the percentage of non-overlapping 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
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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 single-subject research: Methodology and validation. Remedial and Special Education, 8(2), 24–43. doi:doi: 10.1177/074193258700800206
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