More data, more problems: Analytical complications of studying differential family experiences over time: Reply to Laird (2020).

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...