Since interaction design is an opinionated subfield of user experience design, interaction designers hold a more opinionated role compared to UX designers by focusing on the specifics of microinteractions, usability and accessibility.
Because interaction designers are focused on creating key interactions for the product, they’re often expected to be able to create highly interactive and complex prototypes.
For example, IxD’s would be more expected to create a end-to-end clickable prototype with detailed interactions (hover-overs, transitions) on Axure, whereas a UX generalist more likely to do high level screen-by-screen prototypes with Sketch+InVision.
There’s also an expectation of being able to implement designs in code, or at the very least prototype with front-end code.
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