I'm working on a communication platform, that help teams (in healthcare) to work together. People most often post a message to the entire team (~25 people), but can also post a message to one person, or the entire organization (~1500 people).
This question is about a pop-out that is embedded on other web pages.
As space is limited, when you open the list from the bottom of the page, you quickly want to find out what's new.
That might be new messages posted to your team, but also a reply to a question you asked someone two days ago.
The default would be to order threads based on time of last reply. That would show the newest stuff first, but at the same time forces you to read all replies of all threads.
We know that replies are much less important than the initial messages. Except of course replies to your own messages, or replies added after you participated. It would be annoying to have a message sent to the entire organization, to be on top of the list for a few days, just because it has many eyeballs.
Would it make sense to order threads by last reply, but only if you participated in that thread?
So a reply to a thread you created two days ago, will bump the thread on top (for you).
But for another person, who did not reply in that thread, would see the reply counter going up, but the position in the list would stay the same for him.
Message list pop-out