Research also conducted two hierarchical regressions using respondents’ attitudes towards discovery tools and satisfaction with discovery tools as dependent variables. In the attitudes regression, predictors were entered as four steps: (1) computer use; (2) openness to experience as a personality character; (3) importance of DT features; and (4) cognitive appraisal variables: threat and challenge. In the satisfaction regression, predictors were entered as five steps, duplicating the same variables order and adding the fifth step: attitudes towards discovery tools, the first regression explained 54% of attitudes towards discovery tools, and the second 52% of discovery tool satisfaction. Table 2 presents the standardized and unstandardized coefficients of the hierarchical regressions of respondents’ attitudes towards discovery tools.