What verbal reports say about risk perception.
Material type:
TextLanguage: ENG Publication details: 1993Description: 12 pSubject: Investigates the question of whether various tasks give rise to different representations of risks, as reported by Johnson and Tversky (1984). It was found that proximities between risks based on similarity judgements are easily interpretable in terms of a tree representation. The resulting clusters are mostly composed of homogeneous risks. They differed from clusters based on absolute judgments, which are composed of risks of a more diverse character. The results of a multidimensional scaling analysis of absolute judgment data are easily interpretable in terms of three abstract dimensions: size of a potential catastrophe, familiarity, and probability, whereas for comparative judgment data one of the two dimensions found was concerned with the nature of the risk rather than with the abstract risk characteristics. Finally, it was found that verbal protocols of both similarity and absolute judgmental tasks yield the same risk characteristics as used in the psychometric paradigm. The only difference between the two tasks is that in the similarity sorting tasks almost twice as many statements as in the Q-sorting task are related to the nature of the hazardous event. This supports the claim by Slovic et al. (1984, 1985) that similarity judgments are influenced by considerations irrelevant to risk perception
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Bibliography: p. 64
Reprinted from Acta Psychologica; 1993; Vol. 83; p. 53-64
Reprint
Investigates the question of whether various tasks give rise to different representations of risks, as reported by Johnson and Tversky (1984). It was found that proximities between risks based on similarity judgements are easily interpretable in terms of a tree representation. The resulting clusters are mostly composed of homogeneous risks. They differed from clusters based on absolute judgments, which are composed of risks of a more diverse character. The results of a multidimensional scaling analysis of absolute judgment data are easily interpretable in terms of three abstract dimensions: size of a potential catastrophe, familiarity, and probability, whereas for comparative judgment data one of the two dimensions found was concerned with the nature of the risk rather than with the abstract risk characteristics. Finally, it was found that verbal protocols of both similarity and absolute judgmental tasks yield the same risk characteristics as used in the psychometric paradigm. The only difference between the two tasks is that in the similarity sorting tasks almost twice as many statements as in the Q-sorting task are related to the nature of the hazardous event. This supports the claim by Slovic et al. (1984, 1985) that similarity judgments are influenced by considerations irrelevant to risk perception
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