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Why Your Office Needs a Laugh Detector

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Jun 15 2018

Play goes hand in hand with innovation. I learned this from Brendan Boyle, director of IDEO's Play Lab, who says that if you measure the amount of laughter in a project space, the teams who chuckle most are also the most successful. As a data scientist, this idea got my gears turning: What if I could use machine learning to build a laugh-detecting algorithm?

Prototyping is a great way to explore how emerging technologies will play a role in our connected future. But instead of focusing on how we will teach our machines to sense human behavior, I’m interested in designing what we will do with the information our devices are learning. In a world filled with machines that learn and interact with us, it’s important that they are able to respond to all parts of our humanity—including the things that make us laugh.

I wanted to see what kind of laugh detection prototype I could build in a few weeks. Here’s how I did it:

1. Building the algorithm

To build the laugh-detecting algorithm, I knew that I wanted to use deep learning, so I turned to Keras, a programming library which makes creating neural networks fast and simple. To train the laugh detector, I needed to use sequences of audio as the input and predict whether or not laughter would result as the output. Fortunately, I found Audioset, a collection of over two million 10-second audio clips with labels from over 6,000 categories. Using a subset of the Audioset collection that is half laughter and half speech, I was able to get a laughter detection model running with 87 percent accuracy within a few days.

The open data sets, software, and trained models that I was able to use helped speed things along. (For fellow data nerds out there, I wrote a more detailed description of the process on IDEO Labs. I’ve also released my code and models.)

2. Designing the experience

Once I had the ability to measure laughter, I had to tackle the real design challenge: How do we implement the laugh detector in project spaces without making it seem obnoxious or creepy?

I enlisted the help of a few smart colleagues to approach the challenge from multiple angles: a software designer experienced in designing for play, an environments designer to explore how the detector would show up in a project space, and a communication designer who’s written on the science of laughter.

We had a brainstorm around what we might be able to do with a laughter detector, and the ideas poured in. Perhaps we could use laughter as a weekly indicator of morale (similar to Bhutan’s gross national happiness), or host a competition between project teams for who laughed the most? If we could determine when people are laughing, maybe we could figure out why they are laughing, too. We could determine when laughter is genuine or just polite, which jokes are the funniest, or even measure who is laughed at the most.

Some of the more wild ideas included a gif of an IDEO Chicago director Jon Wettersten (below) who laughs along with us, or an alert that would play videos of clowns if we went too long without laughing.

Digital Jon Wettersten is here to laugh with you, not at you.

Ultimately, we wanted to select ideas that would give teams insight into their laughter, but not be too intrusive or prescriptive.

Information systems shouldn’t overwhelm users—particularly when that information concerns people’s moods. There are times when it’s appropriate to not be laughing; you don’t want your smartwatch telling you to laugh more during your grandma’s funeral. And if we were to build a device that listens for laughter, we'd need to make sure that we communicate and maintain people’s expectations of privacy.

With all this in mind, we narrowed it down to two concepts that we would take forward into the prototyping phase.

3. Hatching prototypes

The first thing we made was a simple information dashboard built in Dash. We referred to this design as a “FitBit for laughter,” as it was meant to help teams set goals and measure their progress towards those goals.

This raised the the question, what if you could track your emotional health in the same way that you tracked your physical health? What kind of goals would you set? What would your “laughter workout” look like?

To start, we measured laughs by time of day over a period of 24 hours, laughs per day over the past week, and how close teams are to achieving a daily “laugh quota.”

The second prototype used the output of the laugh detector to control the color and intensity of a Hue lightbulb. When there is a lot of laughter in a room, the light glows a bright yellow to mirror the warmth that laughter brings to a space. When there is less laughter, it transitions to a dim blue to help teams stay calm and focused. In this way, the environment responds to the activities and emotion of its inhabitants.

What if the smart systems we create could react not only to a user’s presence or interaction, but adapt to the user’s mood? How might we design smart systems or spaces that are emotionally responsive?

What if you could track your emotional health in the same way that you tracked your physical health?

4. User testing

We wanted to see how people would react to the laugh-bulb, so we got a few colleagues to sit down and test it out. The original plan was to play funny videos to stimulate laughter, but as soon as people sat down, they started joking so much, the videos were unnecessary.

Laughter is a reinforcing behavior; when you laugh, the people around you laugh too, creating a virtuous cycle that can leave you laughing until you’re sore. Seeing the light grow brighter as the room fills with laughter adds energy to that cycle. The group that came in to test the laugh-bulb ended up laughing so much that you could hear them throughout the studio.

Testing the laugh-bulb prototype.

Next up, I’d love to put these prototypes in front of more people to see whether quantifying laughter can affect their mood. And I'm left wondering, which emotional or mental health signals could be measured and recorded next?

As more aspects of our lives are recorded, we are going to be able to quantify and improve our lives in ways we can’t yet imagine. Let’s design these systems not just to make us smarter, but to make us more joyful, too.

  • Nat Steinsultz

    Designer + Data Scientist, IDEO Chicago
    Nat is a designer in the data science discipline at IDEO Chicago. He is excited about making data science and machine learning accessible and beneficial to everyone. Outside the scope of data, Nat enjoys cooking meals for friends, committing to the bit, and listening to or playing loud weird music.
  • Brian Standeford

    Communication Designer, IDEO Cambridge
    Brian is a graphic designer and illustrator. He specializes in provocative storytelling and brand through bold, minimal design.
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