Oh no, it’s raining! A study of how information in online weather reports is interpreted, integrated, and used in everyday decision-making by laypeople

• Main Author: Sivle, Anders Doksæter
• Format: Dissertation
• Language: English

Different people in different occupations depend on weather forecasts to plan their work and recreational schedules. People with no expertise in meteorology frequently interpret weather forecasts and uncertainty information. These non-experts apply their prior knowledge and experiences in a variety of fields and their abilities to synthesize different types of information to interpret forecasts. Initial studies of communication and the interpretation of forecasts and uncertainty information focused on separate pieces of information rather than the situations of ordinary users. In this study, situations of typical users are simulated to increase the ecological validity when examining how different user groups interpret, integrate, and use information from online weather reports in their everyday decision-making. First, qualitative interviews of twenty-one Norwegians from five different user groups (farmers, exterior painters, tour guides, and upper secondary school teachers and students) were conducted. Second, sixteen upper secondary school students participated in an eye-tracking study. Immediately after this study, the participants were asked to verbalize their thoughts (think out loud) when viewing the gaze data. Semi-structured interviews were conducted to ensure the collection of rich data. In this study, the participants were given weather forecasts from one selected online weather report (www.Yr.no), which served as a basis for both data collections. The verbal data were analyzed by assigning codes and categories to the transcribed statements. The main findings of the study are as follows: a) For each representation, such as tables, diagrams, numbers and symbols, a set of strengths and functions (affordances) was ascribed and exploited by the participants. b) Only part of the representations that provided forecast and uncertainty information at the website was used by each participant. c) Nuances such as color and the number of drops were important in the interpretations of the weather symbols and forecast uncertainty, which were sometimes interpreted differently than intended by the forecast provider. d) Prior knowledge affected the participants' interpretations and even superseded the given information in apparent conflicts. e) The interpretations were also affected by the integration of information from different representations, which was performed to create a dynamic picture of the weather and to control and compare information. f) The decision