MEASURING HAPPINESS IN SURVEYS: A TEST OF THE SUBTRACTION HYPOTHESIS

Responses to an item on general happiness can change when thatitem follows one on marital happiness. Asking about maritalhappiness first sometimes reduces reported levels of overallhappiness. This reduction may result from a change in the interpretationof the general happiness item. According to this hypothesis,when the general item follows the item on marital happiness,respondents take the item to ask about aspects of their livesother than their marriages-in effect, the respondents subtracttheir (mostly happy) marriages in answering the general item.The study reported here tests this subtraction hypothesis byasking versions of the general happiness item that correspondto the different interpretations. A version of the general itemthat asked about general happiness "aside from your marriage"yielded responses that were quite similar to those given tothe standard item when it followed the item on marital happiness.Another version that asked about general happiness "includingyour marriage" elicited responses quite similar to those elicitedby the standard item when it preceded the marital happinessitem. However, reanalysis of the studies that originally demonstratedthe impact of the order of the two happiness items casts doubton the subtraction hypothesis and related models as explanationsof the earlier findings.