A suggestion for the quantification of precise and bounded probability to quantify epistemic uncertainty in scientific assessments
Raices Cruz, Ivette LU ; Troffaes, Matthias C.M. and Sahlin, Ullrika LU
(2022)
In Risk Analysis
42(2).
p.239-253
- Abstract
An honest communication of uncertainty about quantities of interest enhances transparency in scientific assessments. To support this communication, risk assessors should choose appropriate ways to evaluate and characterize epistemic uncertainty. A full treatment of uncertainty requires methods that distinguish aleatory from epistemic uncertainty. Quantitative expressions for epistemic uncertainty are advantageous in scientific assessments because they are nonambiguous and enable individual uncertainties to be characterized and combined in a systematic way. Since 2019, the European Food Safety Authority (EFSA) recommends assessors to express epistemic uncertainty in conclusions of scientific assessments quantitatively by subjective... (More)
An honest communication of uncertainty about quantities of interest enhances transparency in scientific assessments. To support this communication, risk assessors should choose appropriate ways to evaluate and characterize epistemic uncertainty. A full treatment of uncertainty requires methods that distinguish aleatory from epistemic uncertainty. Quantitative expressions for epistemic uncertainty are advantageous in scientific assessments because they are nonambiguous and enable individual uncertainties to be characterized and combined in a systematic way. Since 2019, the European Food Safety Authority (EFSA) recommends assessors to express epistemic uncertainty in conclusions of scientific assessments quantitatively by subjective probability. A subjective probability can be used to represent an expert judgment, which may or may not be updated using Bayes's rule to integrate evidence available for the assessment and could be either precise or approximate. Approximate (or bounded) probabilities may be enough for decision making and allow experts to reach agreement on certainty when they struggle to specify precise subjective probabilities. The difference between the lower and upper bound on a subjective probability can also be used to reflect someone's strength of knowledge. In this article, we demonstrate how to quantify uncertainty by bounded probability, and explicitly distinguish between epistemic and aleatory uncertainty, by means of robust Bayesian analysis, including standard Bayesian analysis through precise probability as a special case. For illustration, the two analyses are applied to an intake assessment.
(Less)
- author
- Raices Cruz, Ivette
LU
; Troffaes, Matthias C.M.
and Sahlin, Ullrika
LU
- organization
- publishing date
- 2022
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Risk Analysis
- volume
- 42
- issue
- 2
- pages
- 239 - 253
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:35007348
- scopus:85122651970
- ISSN
- 0272-4332
- DOI
- 10.1111/risa.13871
- language
- English
- LU publication?
- yes
- id
- 9bdf9b48-c314-4385-b3a8-81f3033346af
- date added to LUP
- 2022-02-18 14:40:39
- date last changed
- 2024-11-05 21:18:54
@article{9bdf9b48-c314-4385-b3a8-81f3033346af,
abstract = {{<p>An honest communication of uncertainty about quantities of interest enhances transparency in scientific assessments. To support this communication, risk assessors should choose appropriate ways to evaluate and characterize epistemic uncertainty. A full treatment of uncertainty requires methods that distinguish aleatory from epistemic uncertainty. Quantitative expressions for epistemic uncertainty are advantageous in scientific assessments because they are nonambiguous and enable individual uncertainties to be characterized and combined in a systematic way. Since 2019, the European Food Safety Authority (EFSA) recommends assessors to express epistemic uncertainty in conclusions of scientific assessments quantitatively by subjective probability. A subjective probability can be used to represent an expert judgment, which may or may not be updated using Bayes's rule to integrate evidence available for the assessment and could be either precise or approximate. Approximate (or bounded) probabilities may be enough for decision making and allow experts to reach agreement on certainty when they struggle to specify precise subjective probabilities. The difference between the lower and upper bound on a subjective probability can also be used to reflect someone's strength of knowledge. In this article, we demonstrate how to quantify uncertainty by bounded probability, and explicitly distinguish between epistemic and aleatory uncertainty, by means of robust Bayesian analysis, including standard Bayesian analysis through precise probability as a special case. For illustration, the two analyses are applied to an intake assessment.</p>}},
author = {{Raices Cruz, Ivette and Troffaes, Matthias C.M. and Sahlin, Ullrika}},
issn = {{0272-4332}},
language = {{eng}},
number = {{2}},
pages = {{239--253}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Risk Analysis}},
title = {{A suggestion for the quantification of precise and bounded probability to quantify epistemic uncertainty in scientific assessments}},
url = {{http://dx.doi.org/10.1111/risa.13871}},
doi = {{10.1111/risa.13871}},
volume = {{42}},
year = {{2022}},
}