I have generally seen the scale used as a continuous scale. One recommendation for cut points (high hope, etc.) would be to use one or two standard deviations above or below mean, although this would be dependent on the characteristics of those who take the scale.
Substantively I am attempting to show change in the hope of individuals with serous mental illness at the time of onset of involvement in mental health services over time. I can use simple change scores but in presentation it would be clearer to be able to say that the individuals moved from low hope to ...
Many thanks
I would stick with the continuous scale for analysis and modeling because of power issues and then turn the modeled results into caseness at the end for 'clinical' interpretation which you may get through conventions in the literature. And you should know the context of application better that anyone else - trust yourself on this.
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