https://www.selleckchem.com/products/capsazepine.html The use of differences scores to assess agreement/disagreement has a long and contentious history. Laird (2020) notes, however, that developmentalists have been particularly resistant to discontinue the use of difference scores. One area of developmental science where difference scores are still in regular use is that of parental differential treatment (PDT) or sibling differential experiences. In this response we argue that, in the case of our particular article (Campione-Barr, Lindell, & Giron, 2020), while the use of difference scores may not have been ideal, they were utilized for several reasons, including the history of the field in operationally defining within-family differential experiences through the use of discrepancy scores, as well as the complicated analytical nature of research examining more than one dyad within the same family. A discussion of whether or not analytical strategies need to change in this literature is important for the field to move forward. (PsycInfo Database Record (c) 2020 APA, all rights reserved).Researchers are often inclined to test agreement or discrepancy hypotheses using difference scores. This commentary explains 2 mathematical-statistical principles underlying associations with difference scores and 2 conceptual-interpretation problems that make difference scores inappropriate for testing such hypotheses. The commentary provides examples of valid and invalid interpretations of difference score associations in reference to equivalent models. The commentary recommends testing agreement hypotheses using interaction terms and explains how to do so. (PsycInfo Database Record (c) 2020 APA, all rights reserved).Discrepancies in first- (M = 14.97 years, SD = 1.82) and second-born adolescents' (M = 12.20 years, SD = 1.90 years) and their parents' perceptions of parental authority legitimacy (PAL) were examined in a longitudinal sample of 145 predominantly White, middle-class, U