Explain the steps the authors took in the sample parametric analysis article you read to determine that long duration PPOC is not superior to short-duration PPOC. (Cole, G. A. Montgomery, R. W., Wilson, K. M., & Milan, M. A. (2000). Parametric analysis of overcorrection duration effects: Is longer really better than shorter?. Behavior Modification, 24(3). 359-378.)