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Gregory W. Thomas

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Publications by Gregory W. Thomas (bibliography)

1995

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Alves-Foss, Janice D., Thomas, Gregory W. and Braun, Curt C. (1995): The Effects of Pictograph Explicitness on Hazard Perceptions. In: Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting 1995. p. 934.

“Little is known about how warning label pictographs representing the same hazard condition compare in effectiveness. Thirty-three undergraduate students viewed six pictographs that varied across three levels of pictograph explicitness (high, medium and low) and two hazard conditions (electric shock and hand trauma). Subjects rated each pictograph on five variables: hazardousness, carefulness, likelihood of injury, severity of injury and exaggeration of the hazard. A composite variable named "perceived hazard" was formed from the averaged ratings of hazardousness and carefulness. Results showed that increasing explicitness was associated with higher levels of perceived hazard, likelihood of injury and severity of injury. The data also indicated that increases in explicitness were viewed as exaggerations of the hazard. These results suggest that the pictograph can play a role in communicating varying levels of hazard.”

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