Is there any more enticing blog title than that one? I recently talked to the local chapter of the Association for Talent Development about training measurement and the point about isolating variables came up, as it always does. Isolating variables means mathematically separating the effects of one thing from another thing. Many folks, including folks in the training industry, believe if you can't isolate the relative contributions of multiple variables to an outcome that the measurement isn't worthwhile. Not surprisingly, I disagree.