Disclaimer: I don’t work at Duolingo. I did not get paid to write this article. I welcome any discussions.

Image downloaded from @Duolingo

Three months ago, my mom, currently living in China, gently asked me on a phone call, regarding whether I’d be ok with spending some time with my niece and cousin and…


Is there a way to represent user selection and answer feedback at the same time? How might we prototype and find out about it?

Edited based on @vojtechbruzek’s work on Unsplash

THE TASK

Imagine you are doing a quiz on your phone. After you selected each question, you’d see whether you got it right or not. With a multiple-choice question with only one correct option, it might appear quite straightforward: the option you selected was either correct or incorrect — and you’ll also…


I have been on Flickr for a while, especially as a big fan of its “Organizr” function that allows a single photo to be included in multiple galleries. With Flickr acquired by SmugMug, I decided to explore what SmugMug had to offer.

I transferred some old photos to the platform…


After two days of preparing materials, practicing the protocol, and setting up technologies, I finally am able to lead a one-hour pilot session. My mentor and peer teammate are observing behind my participant and me, offering support when I need it.

After the pilot session, my mentor thanks the participant…


In Honor of World Emoji Day 2018

The first emoji was created in 1999 on Japanese mobile phones. As of the time I (just) Googled, there were 2,666 existing emojis. For the sake of the flow of this article, please expect no funny pics of emoji in between sentences 😂.

Emoji: A step forward or back for our language?


Personal grudge toward the status quo

The main motivation for starting this Medium article series is for me to become less angry: less angry about not being able to take control of the tool at work or not being able to articulate “what is it about it” that makes me annoyed. And most important of all…


If you ask me to describe something to the opposite of this pandemic lifestyle, I would like to tell you about my experience at a 3-day conference. It was called “Leadership, Authority, and Vulnerability in Groups and Organizational Systems,” where everyone becomes members of small and large groups to “live…


Two weeks ago, as part of the discovery phase research activities, my teammates and I were building personas based on our understanding of the users. After we put together the characteristics of each persona and their respective pain points, it was time to turn them into profiles with profile pictures…


I wanted to give my boyfriend a Kanken backpack as a gift. I know he always wanted one, so it should be a very safe gift. But what color? When asked, he said he wasn’t sure.

Could I help? I asked myself.

What can I do to help him make…


A few years ago, I went to a UX training day-long conference on usability testing led by Nielsen Norman Group (NN/g), the leading research & consulting group in the UX industry. This month, I was luckily invited to do an intro-level training at my company on usability testing for some…

Yulin Liu

A linguistics nerd, UX advocate, and non-fiction reader. Currently in NJ.

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