An HCI class study evaluating Carrot (당근마켓)'s usability — where the app's core flows feel complex, and where they don't.

Overview

For an HCI course project, I studied Carrot, Korea's largest secondhand marketplace app, to understand how its interface complexity affects real users. Rather than relying on my own read of the app, I ran a mixed offline and online survey alongside follow-up interviews to hear directly from people who use it.

Role & Tools

Research design, survey construction, and interview moderation, as part of a team HCI project. Combined in-person and online survey distribution to reach a broader range of users, then followed up with interviews to dig into the "why" behind the survey results.

Highlights

• Designed a mixed offline/online survey so the sample wasn't limited to tech-comfortable users alone.
• Ran follow-up interviews to understand why certain flows felt confusing, not just where people dropped off.
• Presented findings back to the class, mapping the specific points in the app where complexity outweighed the problem it was solving.