a Further details on the breakdown of variance explained by the control variables, main effect variables and the interaction
variable are provided at the bottom of the table. As indicated, the significant p-values for the R2 change confirm that each
set of added variables (the set of main effect variables as well as the single interaction variable) contributes significantly to
the amount of variance explained.
c This total number represents the number of responses with a clear indication of the respondent’s provincial institute
affiliation. The number of responses used below in the ‘‘regression for independence commitment (all respondents)’’ is
smaller than this number because with the listwise deletion used, cases with missing values for any variables involved were
excluded.