Temporal order means that one variable precedes another in time. Because of this time ordering, it is said that one variable affects or causes another variable, though a more accurate statement would be that one variable probably causes another. When dealing with studies in the natural setting and with humans, researchers cannot absolutely prove cause and effect (Rosenthal & Rosnow, 1991), and social scientists now say that there is probable causation. Temporal order means that quantitative researchers think about variables in an order from “left to right” (Punch, 2005) and order the variables in purpose statements, research questions, and visual models into left-to-right, cause-and-effect presentations. Thus,