designing for conversation
TRANSCRIPT
CONVERSATIONAL INTERFACES DESIGNING FOR—AND BEYOND—BOTS AND AGENTS
September 23 @nextconf
https://www.flickr.com/photos/maximalideal/16319696881/
“Machines should work; People should think” an excerpt from The Jim Henson Company 1967 video "Paperwork Explosion”.
from 1967…
"The dream of conversational interfaces is that they will finally allow humans to talk to computers in a way that puts the onus on the software—not the user—to figure out how to get things done.” — FastCompany, Conversational Interfaces, explained
…to 2016
A conversational interface is a program that you primarily interact with through a back-and-forth dialog—using either voice or text—instead of a more traditional graphical UI.
…at least, that’s how we think of them today.
What is a conversational UI (CUI)?
The two most common types of CUI are currently (text-based) chatbots and (mostly voice-based) AI assistants. But there are also already, many variations on this theme.
What kind of CUIs are there?
“The introduction of bots to Facebook and other platforms has been overhyped—and the bots themselves often aren't very good…[many] aren’t nearly as good as the native apps they were designed to replace.”
— Facebook Messenger chief David Marcus
Is this bot thing just hype?Right now…maybe. :) There *is* a lot of hype, and many bots are barely useful.
But it’s important to consider why bots and AI assistant exist today, as this can help us understand where they go in the future.
WHY NOW?
5
Chatbots are not a new invention, and either are AI assistant.
Clippy, 1997 The much hated Clippy was annoying, because it promised a smart, helpful assistant, yet wasn’t sophisticated enough to deliver on that promise.
ELIZA, 1966 Developed by MIT, the most famous Eliza bot was DOCTOR, a simulation of a Rogerian psychotherapist.
We’ve been here before…
The reason conversational interfaces may finally go mainstream, is that we’ve reached a combination or human and technological tipping points that have created new opportunities and expectations.
• artificial intelligence • cloud computing + data • mobile everywhere • messaging everywhere • new behaviours/expectations • app fatigue
Artificial intelligenceThe past few years have seen big advances in artificial intelligence, and machine learning technologies.
These technologies enable key aspects of CUIs, such as automatic speech recognition (which converts voice to text) and natural language processing (which determines an input’s meaning).
an example of language parsing and processing using Facebook’s open source wit.ai
text input
structured data
output
Cloud computing + dataThe widespread availability of low-cost, “infinite storage” through cloud computing let to a big data explosion, and greatly reduced the cost of the intensive computation needed to run machine learning.
(Many popular machine learning APIs are in fact now combined with a cloud offering).
cloud-based machine learning and cognitive computing
AWS cloud computing and cloud-based machine learning
cloud-based machine learning
Mobile is everywhere
Number of mobile internet device subscriptions worldwide (in billions)
Mobile now reaches half the worldwide population, with the largest recent and projected gains in Asia and countries outside Europe and N. America.
This demographic change is important as a mobile is often the first or only computer these new internet users will own.
For many mobile-first users, social and messaging apps are a primary window onto the internet. In fact—many even believe these apps are the internet.
1B
1B
800M
220M
275M
Messenger
WeChat (China)
Line (Japan/APAC)
kik (N America)
And if you use mobile, you use messaging
Source: Why Southeast Asia is Leading the world’s most disruptive business models
find a social vendor browse products inquire via messaging(often using another app)
get payment details(digital or otherwise)
ship and trackconfirm payment
These messaging apps were in fact the first prototypes of ‘conversational commerce’—ad-hoc experiences assembled by users to meet a need.
“Most smartphone users download zero apps per month” - Quartz
Fewer apps used per month
of time spent on mobile is within five non-native apps
Most download zero apps per month
These trends are colliding with a growing app fatigue. Although time spent in apps is up, most people primarily use just a few apps—and many of these, are messaging apps.
“Only five apps see heavy use” - TechCrunch
84%
AI ASSISTANTS VS CHATBOTS
10
AI assistants are services whose job is to serve as an enabler for different types of interactions.
Their primary means of input tends to be voice, but a user’s mobile is often used to output more complex data and responses.
AI Assistants
Apple’s Siri (can be voice + screen)
Microsoft’s Cortana (can be voice + screen)
Amazon Alexa (primarily voice)
Ok Google (can be voice + screen)
Most assistants have a collection of core behaviours—such as fetching the time, setting an alarm, or sending an email—but most are also platforms.
Core behaviours
Just a few of ‘Ok Google’s’ core behaviours
With each new brand that creates a service for the platform, the assistant (and therefore its users) gain a new set of skills*.
*Amazon (shown right) actually calls these skills. Other platform will have different names for them.
Third party ‘skills’
Bots are small services that you ‘chat’ with through a text interface such as Facebook Messenger or SMS.
Chatbots (…or Bots)
The Taco Bell tacobot for Slack
Some bots are standalone products, while others aim to provide a subset of tasks from a larger service.
In this sense, bots are similar to the ‘skills’ found within assistants: single-domain micro-applications that help users complete a range of tasks related to an activity—such as booking a flight or finding an apartment.
Trim is a personal finance bot with a very simple value proposition—help you save money by keeping an eye on where and how you spend.
The Expedia bot enables users to search for hotels, and book them using expedia.com.
There are already quite a few hybrid approaches. Facebook M for example, is an AI assistant that uses text chat instead of voice.
More importantly however, it’s one of a growing number of services that combine automation with ‘humans in the loop’ .
Hybrid approaches
“Hi! I’m M, your personal assistant in Messenger”
Facebook M has human trainers who silently supervise, and take over complex tasks.
Operator’s human assistants get to know their clients to better curate products to their tastes.
Clara, a scheduling AI is supported by experienced Executive Assistants.
Hopefully not :-)
There are many contexts where we will still need a more traditional graphical UI—either because the task is just too graphical in nature, or just because a bot doesn’t really add to the experience.
Will everything become a bot or CUI?
These apps may however soon have bots of their own.
AI-powered assistive interfaces are starting to appear within more complex apps that could benefit from smart, human-guided use of artificial intelligence.
Embedded, assistive AIs
While not (yet) conversational, the Google Sheets Explore panel acts as an assistant that proactively suggests alternate data renderings for your spreadsheet.
An AI whose job is to watch over us…
•to proactively problem solve, •suggest more effective ways to complete a task,
•provide a more ‘human’ interface through which to collaborate (with other people, or other bots). Crystal provides ‘personality profiles’ for contacts, and
helps you better communicate with them.
…hence all the hype :)The promise of conversational apps appears huge: •more human and personal than a GUI •faster and simpler to use…if the context is right • low commitment, ephemeral…closer to the web than apps •mobile ‘native’…born of, and uniquely suited to mobile e.g. interaction models, contexts of use, use of sensors
…maybe one day a companion—rather than merely a tool
DESIGNING FOR CONVERSATION
20
In this section, we’ll look at common challenges, and design considerations when building bots and conversational services for AI assistant platforms.
We are in the “primordial soup” phase of bots and AI-augmented services. Existing platforms are immature, and prone to change.
Disclaimer
0. PLAN FOR DISCOVERY
Although bots are zero-install, (and ‘skills’ for assistant platforms are broadly similar) users still have to know the service exists before they can enable or interact with it.
In this sense, we’ve somewhat replaced the app store discovery problem with a bot store discovery problem :(
Platform-level discovery>4000
>30,000
>2700
~1000
Telegram
Messenger
Amazon Alexa
Slack
Thankfully, some platforms already offer tools that make it easy to share a bot or embed just-in-time discovery within other interactions. (This will hopefully become standard practice, and make bots more similar to web sites, than traditional apps).
Contextual discoveryJust in time discovery plugins Facebook web plugins enable users to initiate a chat conversation, or pass information to Messenger for onwards interaction.
Share a bot Share Telegram and Facebook Messenger bots using a hyperlink*.
*A URL opens in any browser, but Messenger and Telegram bots only function within those apps. A shame that there isn’t further interoperability.
https://telegram.me/<bot username>
m.me/<bot username>
https://www.flickr.com/photos/marketingfacts/6323249188/
Just in time discovery isn’t limited to digital platforms. A key enabler, within WeChat is QR codes—which are often used to initiate or complete an offline-to-online (O2O) interaction.
kik, Facebook Messenger and Snapchat offer similar 2D codes, which users can scan to follow a brand, or initiate a conversation.
...in Korea, grocery stores are embedded on Subway platforms where users scan QR codes to buy items that are delivered just-in-time for dinner
CASE STUDY: CONTEXTUAL DISCOVERY
KLM embeds Messenger plugins at various stages: • ticket purchase, • check-in • boarding pass retrieval
Users who opt-in, then receive their confirmation, check-in notice, boarding pass and flight status updates via Messenger.
1. KEEP IT SIMPLE
30
Today (and for the foreseeable future) bots and AI assistants will remain pretty simple. Today’s services are good at answering simple questions, and are best suited to completing simple, repetitive tasks.
If your bot promises more than this, it will likely disappoint, and this is as much due to human factors as technology constraints.
CUI proponents often compare them to gesture and touch based interfaces.
Interfaces that ‘natural’—because most people already know how to scroll, swipe, speak or type.
‘Natural’ UI…
https://www.flickr.com/photos/hams-caserotti/6160875175/
‘Natural’ but not automatically intuitive While they may at first glance seem intuitive, ‘natural’ interaction models often share similar challenges.
If for example, a gesture is completely new, it will have to be taught, and may be hard to discover on its own.
Dash by Bragi “a discrete personal assistant right in your ear”
Gesture: activate touch lock
Gesture: deactivate touch lock
Similarly, if you don’t know what a bot or AI assistant can do, or how to properly ask, you can waste a lot of time guessing.
The simpler the bot, the easier it will be for users to quickly, build a conceptual model of what it can do.
This is particularly critical for voice-only services as there’s no screen to refer to.
The majority of bots are also still powered by rules (not that different from the decision trees we’ve used for years in telephone systems).
And although chats look like a conversation, the bot is simply ‘slot-filling’—asking the necessary questions to formulate a query with set parameters.
It can only understand certain questions, and respond with specific, pre-chosen commands. If a user say the wrong thing, it won’t know what she mean.
Bots that use elements of machine learning may go a step further, as they can begin to understand language*.
Users can therefore be less specific with their commands, and the system can generate its own responses—gradually expanding its vocabulary over time.
Next up…machine learning
Image: Isazi consulting*to a degree, you can’t yet expect full fluency from any of these systems
The most useful and successful bots (even fairly complex ones) have one job.
They also solve real, demonstrable problems (and ideally, something for which a much better alternative doesn’t already exist).
Give the bot one job
This extremely simple bot identifies images.
The problem the bot solves should be easy to convey, simple to understand, and (hopefully) include steps that users may be able to guess on their own.
Bots that leverage mobile (camera, sensors, notifications etc.) to simplify tasks, will often be particularly useful.
Example: Energy company account bot• receive monthly bills • check balance • get monthly reminders to submit a meter reading
• snap a photo of the meter to send your reading (or type it in)
2. SET EXPECTATIONS
40
Use any means available to help users quickly understand what they can do.
Hello!Monday, 4:09 pm
Hello…Monday, 4:09 pm
Hello…?Monday, 4:12 pm
Hello…?Monday, 4:15 pm
Hello…?Monday, 4:16 pm
Most bots are zero-install, but users still see a bit of information before they begin a chat.
Facebook Messenger for example, provides an introductory screen where you can set basic assumptions:• how fast does the bot respond? • what does the bot do? • what can you ask? • what personal data will it see?
Onboarding
It’s also good practice to welcome users with a few prompts describing the most likely starting point, and what information the bot will need to complete a that request.
I might get confused
This is my job
Start like this
Here are terms I understand and
can filter by
Can I interest you in this useful thing?
The more constrained or well understood the task—for example booking a train ticket—the more likely users will make correct assumptions of their own. This is less likely if your bot does something new or bespoke to your service.
A known/fixed task?
Trim, the personal finance bot “can show you a few ways to save money”. Because ‘saving money’ isn’t binary…it must then explain what this means.
Platforms such as Facebook Messenger, Telegram, and Slack also enable you to include custom buttons and keyboards (in Telegram only) that allow for faster, and more accurate input.
Facebook quick reply buttons
Telegram custom keyboard
CASE STUDY: RESTRICTING TASKS AT PLATFORM-LEVEL
15
Apple has restricting third-party apps within Siri to six domains: ride booking, messaging, photo and video, payments, VoIP and workouts.
This helps set expectations, as users are (a bit) less likely to ask Siri for something outside these categories.
Users also enjoy better UX as Apple can gradually release, and optimize vocabularies for each domain.
Third-party apps in Siri
3. DO INVOLVE HUMANS :)
55
Bots shouldn’t attempt to replace what is best left to a traditional graphical UI. (…and if they do, they maybe shouldn’t use Poncho the weather bot as role model)
vs.
glanceable, easy to understand despite high information density
They also shouldn’t attempt to replace things that humans are really good at…
Computers are really good at… • data retrieval, sorting, filtering • complex maths, • parsing vast datasets • doing this over and over (they won’t get bored or frustrated)
Computers are getting better at… • analyzing human sentiment • understanding intent outside set domains or vocabularies • determining content and context of images, video etc.
Computers are incapable of… • emotional intelligence • empathy • human reasoning • pragmatism • (un-scripted) persuasion • actual conversation!
(…a partial list in all cases)
There are also very basic aspects of ‘real’ human conversation that computers still struggle with.
This includes, maintaining the scope of a conversation, chaining conversations together, and differentiating a new question, from a follow-on question. Source: @jonesabi
This can be particularly aggravating with text chat, as there’s a visual record of the conversation. It’s therefore easy for users to assume the bot ‘knows’ everything that’s been said.
In the case of Facebook M and personal assistants like x.ai, providing human assistance in tandem with automation may be purely tactical. "M is a human-trained system:
Human operators evaluate the AI's suggested responses, and then they produce responses while the AI observes and learns from them.” — Facebook AI Research
Other reasons to involve humans
Take over complex tasks that can’t be automated • “plan a birthday party”
Offer services that can’t yet be automated
• APIs often don’t yet exist for one AI or service to interface with another
Generate usage data • clarify key use cases to inform the product roadmap
• to train the AI
CASE STUDY: BUILT-IN HUMAN ROUTING BASED ON CONTEXT
15
Edward’s design was informed by a deep understanding of typical guest queries. The goal was to automate the most common and routine queries, to free up front desk staff for face to face interactions.
what cuisine does your restaurant serve?Tuesday, 8:30 pm
please send me some iceTuesday, 8:00 pm
please don’t clean my room todayTuesday, 7:45 am
what time do I need to check out?Wednesday, 7:00 am
can you send me more towels?Tuesday, 7:12 am
I’d like a paper delivered to my roomMonday, 6:00 pm
Hi…i’m Edward, Radisson Blu Edwardian’s virtual host
Monday, 4:09 pm
“We were intrigued to find out how many different questions a guest can have during a stay: 153 to be precise” — Tobias Goebel, Aspect software
Edward, the virtual host
Edward’s handles routine questions, and automatically routes more complex requests to appropriate staff.
Source: Aspect software
Universal template for self-service
4. GIVE USERS AN ESCAPE HATCH
Despite your best efforts, users will get stuck, or need help that’s beyond the bot’s capabilities.
Always build in easy and intuitive ways for users to quit a task, start over, or speak to a person*.*even if the response is not immediate
Source: @superwuster
Shown when you first open the bot. Nice! But you may forget it’s there.
I tried this, to see what would happen, and was pleasantly surprised. Nice!
From Bot to human…
Users see this when they directly message customer service out of hours.
From human to bot…
A few nice examples…
5. CONSIDER PERSONALITY AND PERSONA
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“Pretending that bots are humans is impersonal. If customers are in conversation with an entity that they think is a person, but then realise through inevitable technical limitations that it is in fact a bot, how do you imagine they will feel?
And how could that feeling ever be good for business?”
— Paul Adams, Bots vs. humans
While it’s good practice to enable users to switch from human to bot—obfuscating this process may not be in your best interest.
Source: @jonesabi
This is down to trust, but also our tendency to anthropomorphize; to attribute human characteristics to animals, inanimate objects, or natural phenomena.
“[iRobot] regularly received calls asking for help to fix “Rosie” or “Seamus” or “Floorence”. Customers expressed concern when iRobot told them to mail in their Roomba, and receive a new one in return—as they might with another small appliance.
…They didn’t want a new vacuum…they wanted “Rosie” to be fixed—or more to the point, healed.”
— Paul Colin Angle, CEO if iRobot
Anthropomorphism isn’t completely understood, but can occur even if the object has no recognizable human form.
…it can even occur when a ‘thing’ has no physical form at all.
As people are likely to attribute human qualities to your bot regardless, you should consider what kind of personality you’d like it have.
“Bots are personas, whether or not it’s intended. Every participant will project an identity onto the bot, its gender and personality — whether or not it has been created intentionally by the design team.” — Chatbots ultimate prototyping tool, IDEO
Personality can be tricky to get right. A common problem is to misjudge how much personality may be too much—and in what context.
Jokes may be OK for this weather bot, but would be exasperating if this were a airline bot with a flight delay message.
Persona mismatch? Facebook is trying to seem friendly, but if the context is wrong, it just feels weird (Zach is Scott’s son).
“…we had to outlaw Howdy’s bots from asking rhetorical questions ‘because people expect to respond to them, even though the bot was just being polite’.”
— FastCompany, Designing chatbot personalities
Cultural and social norms Politeness can be deeply cultural, and consumers is certain markets may feel particularly compelled to respond.
Culture, social norms, and the user’s personal context are also a factor.
People often experiment with a bot (either to understand what it can do, or just for fun).
Anticipating these questions is a nice way to develop the bot’s personality in a more neutral context (i.e. users aren’t actively trying to ‘get things done’…so may be more open to chit chat).
Google Assistant, within Allo
6. EXPECT THE UNEXPECTED(I.E. HUMANS)
Communicating with services on a private device, and in a more personal context, also changes our expectations.
Any brand or organization entering this space should consider whether this may create entirely new, and unexpected interactions.
Source: Washington Post (March 2016)
Siri’s response to ‘I was raped’…
“I don’t know what that means. If you like, I can search the Web for ‘I was raped.’”
Samsung S Voice: ‘I am depressed’…
“Maybe it’s time for you to take a break and get a change of scenery.”
Society is still coming to terms with what this means, and where the responsibility may lie in these complex, and very human scenarios.
A complicating factor is that, some software is no longer taught what to say—it simply decides on its own*.*based on input from millions of users with varying motivations
7. GROUP DISCUSSION
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