statistics - Ordered Probit R -

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i'm trying create ordered probit model in r. independent variable categorical, dependent variable ordinal. i'm using polr command , go through. when run command, log odds different variables. have converted them odds ratios using exp command. far understand it, these odds ratios tell me probability of dependent variable going 1 category every time independent variable "goes up" 1 category. correct? i'm confused because in case of independent variable, it's not increase since categories.

my second question concerns interpretation of polr. odds ratios. how recommend additional information on suitability of ordered probit? thanks!


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