Acceptance threshold for the item-level CVI — cvi

The I-CVI value at or above which an item is judged content-valid depends on how many raters judged it, because the chance of unanimous agreement falls as the panel grows. A threshold is therefore a function of panel size rather than a constant.

Usage

cvi_threshold(n_raters)

Arguments

n_raters: Integer [1, Inf): Number of raters on the panel.

Value

Numeric in [0, 1].

References

Polit, D. F., & Beck, C. T. (2006). The content validity index: are you sure you know what's being reported? Research in Nursing & Health, 29(5), 489-497. doi:10.1002/nur.20147

Author

EDG

Examples

cvi_threshold(3L)

#> [1] 1

cvi_threshold(9L)

#> [1] 0.78