Motive research in the McClelland-Atkinson tradition is based on a concept of validity that emphasizes a measure's sensitivity to experimental manipulation. In this talk, I will briefly portray this view of validity and connect it to modern views of validity that place a premium on understanding the causal process that generates measurement scores. I will also discuss why sensitivity to manipulation is not enough to establish validity and introduce the EMMIC validation approach, consisting of experimental manipulation, measure, indicator, and criterion.