I want a little more information than three questions but 100 questions would be more data than I would need and probably more than the respondents would want to answer.
The answer is the Couple Satisfaction Index, either 4, 16, or 32-item scale.
http://fetzer.org/sites/default/files/images/stories/pdf/selfmeasures/Self_Measures_for_Marital_Satisfaction_COUPLES_SATISFACTION_INDEX.pdf
Principal-components analysis and item response theory applied to the larger item pool were used to develop the Couples Satisfaction Index (CSI) scales. Compared with the MAS and the DAS, the CSI scales were shown to have higher precision of measurement (less noise) and correspondingly greater power for detecting differences in levels of satisfaction. The CSI scales demonstrated strong convergent validity with other measures of satisfaction and excellent construct validity with anchor scales from the nomological net surrounding satisfaction, suggesting that they assess the same theoretical construct as do prior scales. Implications for research are discussed.
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