This research examines changes in participant decision-making styles as a result of participation in scenario planning. Results indicate that participants tend to shift toward more intuitive-based decision-making styles after participating in scenario planning. These findings support and add further evidence to previous investigations into decision-making style and scenario planning. To explore this relationship, we employed a quasi-experimental pretest-posttest one-group design with scenario planning as the intervention. Confirmatory factor analysis provided validity of measurement scores and pair samples t tests were used to test hypotheses on the five factors of the General Decision-Making Styles Survey (GDMS). This study documents the responses from participants (n = 170) from 10 organizations using the General Decision-Making Style Survey.