Although the literature generally views MSB as indicative of low decision-making quality, potential low decision-making quality among nonmultiple switchers is not well understood. Here we can separately identify decision-making quality and MSB. Interpreting the regression coefficient as data quality, we explicitly test decision-making quality for multiple switchers and nonmultiple switchers in table 5. The results show that data quality is insignificantly different from 0 for both multiple switchers and nonmultiple switchers in the control group, and is only significantly different from 0 for the nonmultiple switchers in the treatment group. MSB is not a good indicator of data quality in the control group (⁠$p$-value $=$ 0.567). Among nonmultiple switchers, data quality is significantly higher under the nudge treatment than under the standard protocol (⁠$p$-values $=$ 0.025).