The Five Questions That Defined Life Satisfaction (Diener et al., 1985)

The Question

Could a tiny five-item scale capture life satisfaction reliably enough to replace the noisy single-question approach researchers had been forced to use?

What They Found

• Starting from 48 candidate questions, factor analysis pulled out a clean life-satisfaction factor and the team kept whittling until only five items remained
• Internal reliability across the validation sample landed at Cronbach's alpha around 0.87, exceptional for a scale this short
• Two-month test-retest reliability was 0.82, showing the score reflects a stable judgment rather than passing mood
• The scale correlated with nine other well-being measures and with interviewer ratings, confirming it was tracking the same underlying construct from multiple angles
• The wording has not changed since 1985 and the SWLS now appears in over a thousand published studies across thirty-plus languages

How They Tested It

• Validation sample of 176 undergraduates at the University of Illinois, plus a separate retest sample of 53 students two months later
• Started with 48 candidate items spanning satisfaction, positive affect, and negative affect, then dropped any item that loaded onto mood rather than judgment
• Compared SWLS scores against nine existing well-being instruments and against face-to-face interviewer ratings of how satisfied each person seemed
• Also tested a sample of older adults to confirm the scale worked beyond the student population the items were drafted on

Caveats

• The original validation samples were small and skewed toward American college students; later cross-cultural work filled in the gaps but the 1985 paper alone could not
• Item 5 (“If I could live my life over, I would change almost nothing”) is strongly age-sensitive; younger respondents score it lower regardless of how their lives are objectively going
• The scale captures a cognitive judgment only and tells you nothing about day-to-day mood; pair it with a measure like the WHO-5 for the affective side of well-being

How Reborn Helps

Reborn lets you take the original five-item SWLS in under a minute and see your score against the international average, with the same wording Diener published in 1985.