There is more than one mode of study for doctoral researchers. Some are not campus-based and study from a distance. It may be more convenient for some people to work from home, but this brings with it distinct challenges. Some are these are discussed in this section
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In this podcast, Katrina talks about her experience of being a distance learner and a project she leads to support those studying doctorates from a distance.
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This journal article offers a systematic review of studies of doctoral researchers who study online.