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the claim

People systematically overestimate their future happiness when imagining major positive life events.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Evidence from psychological research confirms the impact bias in affective forecasting, showing that individuals systematically overpredict the intensity and duration of their future emotional responses.

The analysis

The retrieved literature consistently supports the existence of an 'impact bias' in affective forecasting, where people overestimate the intensity and duration of their future emotional states. Papers [1], [3], [4], and [10] explicitly discuss this phenomenon and empirical inaccuracies in predicting future affect.

Evidence for · 4
The impact bias in self and others: Affective and empathic forecasting in individuals with social anxiety.
Recorded source metadata

Kimberly A. Arditte Hall, J. Joormann, M. Siemer, K. Timpano. The impact bias in self and others: Affective and empathic forecasting in individuals with social anxiety.. 2018. https://doi.org/10.1016/j.brat.2018.05.001

Supports the claim by demonstrating that people exhibit the 'impact bias' in affective forecasting, overestimating the intensity and duration of future affect.

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More for · 3
Associations Between Social Anxiety and Affective and Empathic Forecasts: A Replication and Extension in a Mechanical Turk Sample.
Recorded source metadata

Kimberly A. Arditte Hall, Kevin Coleman, K. Timpano. Associations Between Social Anxiety and Affective and Empathic Forecasts: A Replication and Extension in a Mechanical Turk Sample.. 2020. https://doi.org/10.1016/J.BETH.2019.06.004

Reconfirms the presence of impact biases where individuals systematically misjudge future emotional states.

Do We Know What We Enjoy? Accuracy of Forecasted Eating Happiness
Recorded source metadata

Karoline Villinger, D. Wahl, L. M. König, K. Ziesemer, Simon Butscher, Jens Müller, H. Reiterer, H. Schupp, B. Renner. Do We Know What We Enjoy? Accuracy of Forecasted Eating Happiness. 2020. https://doi.org/10.3389/fpsyg.2020.01187

Demonstrates that individuals show forecasting errors (impact bias) regarding upcoming emotional events, supporting biased affective predictions.

Affective Forecasting Accuracy in Everyday Life.
Recorded source metadata

Moeck EK, Grewal KK, Mehta A, Greenaway KH, Koval P, Kalokerinos EK. Affective Forecasting Accuracy in Everyday Life.. 2026. https://doi.org/10.1007/s42761-026-00364-x

Discusses how affective forecasting research consistently reveals that people make errors in predicting their absolute future affect levels.

The paper trail · every fact has a biography
first checked01 Aug 2026
judged → SUPPORTED · 8401 Aug 2026
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