An important feature of the study was the creation of job environment variables based on neutral self-report items. This chapter advances the view that carefully worded self-report items can sometimes be as helpful as many “objective” indicators in constructing measures of the work environment. This is not to say there will be no risk of confounding with prior psychological symptoms. The extent to which there will be confounding is an empirical question that should be studied. The issue of which items are likely to be confounded with prior symptoms ought to be resolved in pilot research prior to the substantive study.