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Antti Oulasvirta Profile picture
Antti Oulasvirta
@oulasvirta
Computational models of human behavior. HCI Prof at Aalto University. On sabbatical at UC Berkeley '23-'24. Group page: https://t.co/f4ayVbnUA2
Dec 16, 2019 • 9 tweets • 3 min read
Our 5th paper (cond) accepted to #chi2020 is "Optimal Sensor Position for a Computer Mouse"

If you turn your mouse upside-down, you'll see its position sensor. WHY is it where it is? We present a method for optimizing its position in task and improve user performance by 4-20% 1/ One might think that the mouse is studied through-and-through, being as well-established and old as it is.

But it's not!

Previous work has looked at everything from transfer functions to weight and shape, but the position of the location sensor has been overlooked 2/
Apr 3, 2019 • 16 tweets • 8 min read
Thread: How HCI research helped improve the French keyboard🇫🇷

It came out yesterday: The new AZERTY, the first keyboard standard created with the help of HCI and algorithms.

What a ride! Optimization + Models + Participatory Design

aalto.fi/news/changing-…

Scroll on👇 (1/14) The NEW AZERTY includes commonly used characters, such as œ, « », É, -- and 60 other new characters. Arranged into intuitive groups. The layout is designed to improve ergonomics and performance.

Shout out to @AnnaFeit Mathieu Nancel, Andreas Karrenbauer, Maximilian John
2/
Mar 6, 2019 • 24 tweets • 8 min read
Rant: Nine reasons why I don't believe in current VR/AR technology.

HoloLens, Magic Leap, and Oculus: Mind-blowing videos, and the market is estimated to explode to $200 billion by 2025 (Statista). So what's wrong?

HCI research tells why we haven't seen a killer app yet: 1/22 First, the gorilla arm. The videos show smiling users holding their arms up for extended periods. But that will cause shoulder pain. research.aalto.fi/files/18129437… The Consumed Endurance model estimates that a user can hold arm up for just 90 seconds before starting to fatigue. 2/22
Oct 24, 2018 • 13 tweets • 3 min read
1/12 The Paradox of the Active User is three decades old. Let's talk about it!

TL;DR: While the paradox has assume a folklore status in design, it was misinterpreted from the start and has become an impediment to ambitions in computing at large. 2/12 In 1987, Carroll & Rosson [1] found that users thwart interactions that require reading manuals and practice, even though this results in long-term inefficiency. They wrote: "One of the most sweeping changes ever in the ecology of human cognition may be taking place today."