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While doing some research on Multimodal Usability and User Interfaces, I ran across a list of Three Main Attributes of Multimodal User Interfaces, which on careful thought, can definitively be applied to ANY User Interface. It was a nice refresher which reminded me of why good design is so difficult to achieve, but very rewarding.

Good User Interfaces can be judged based on their:

  1. Effectiveness: Whether a user can achieve a desired goal or a certain task with a predefined degree of perceived accuracy. This one has to do directly with our users and their environment. Good questions to ask ourselves: What level of accuracy are you designing for? What completion rates can you expect from certain design strategies? How satisfied will your users be after completing a task?

  2. Efficiency: How much effort (fatigue, frustration, cognitive demand, stress, discomfort, number of tries) and resources (time) will those users need to complete a task. Good questions to ask ourselves: How long is it going to take for an average user to achieve a certain goal? How many error corrections can we expect from certain design strategies? Will users obtain something of a higher value than the one they are putting into the interaction?

  3. Learnability:Whether a user can easily discover the functionality contained in a system and quickly learn how to use it. Good questions to ask ourselves: How intuitive is my design? Based on the context on the interaction, does the funtionality offered by the system match the user’s expectations? How easy is it for users to explore and discover new functionality and advanced features?

Based on these attributes, where do your design stand? Come on, don’t be shy…

Here in the VUIDesign blog, we’ve covered more than a few free cell phone services that provide great value (particularly considering the cost), are very easy to use, convenient and flat out helpful.

Therefore I was very happy to see Mr. Pogue cover three of my favorites on his Personal Tech blog (the video is particularly interesting, you should give it a look). Most of them take advantage of speech recognition, but they all make a good job of taking the complexity away from the users - which I wish every service out there would strive for.

Here’s a quick summary of what each one does, but nothing compares with calling the real thing and taking it for a ride:

  1.  Google’s Free 411 (1800-GOOG-411) - Free 411 service that allows you to find and connect with local businesses. Some of the extra cool features offered include the capability of saying “text message” to get a text message with the business details (name, address, phone, etc.), “map it” or a map showing its location, or simply stay silent and getting connected to that business. Only thing I wished they had is foreign languages of the same service (currently English only)
  2.   ChaCha (1800-2CHACHA) - Free mobile answers service where you can just dial their number, ask any question in “conversational English” (as if you were doing a web search), and after a minute or so you receive the answer in the form of a text message. Part of the secret sauce of course is the fact that searches are actually performed by “guides” which get paid about $0.20 for each answer they provide.
  3. Jott (1866-JOTT-123) - Free voice to text service that basically allows you to convert your voice into all sorts of textual representations such as text messages, email, reminders, lists, etc. In particular, this service has become very popular amongst bloggers and twitters since it’s relatively easy to take this one step further and set it up in such a way that you can send the messages to web services that would publish them automatically to the web.

I would be interested in hearing your experience with these services as well as any others you might have found just as usable (and hopefully just as free)

Finally had a chance to look at this month’s cover article of the SpeechTEK magazine. What a joy! I was very pleased to see that once again, the topic of Translations (which I often refer to as “Transgressions”) comes up in an attempt to raise awareness about the implications of simply taking content in once language and doing a straight 1:1 translation without any consideration for cultural issues and linguistic nuances. As the author pointed out, translations are “a quick, cheap, lousy idea.” (well said!)

As the article points out, in the particular case of IVR systems there are various syntax and grammatical issues to consider as well as code implications and underlying logic divergences derived from those structural differences - it’s not just a matter of word order!

Furthermore, the author makes a really good point about the dual nature of IVR and Speech Recognition systems in the sense that we should not only be careful about what we say and how we say it (the outgoing activity) but also about the incoming activity – what callers say, how they say it, etc.

Along with the list of Tricks of the Trade provided, things such as the use of a native speaker for reviewing localized Dialog are of utmost importance.

Finally, one of the topics that often comes up when dealing with countries where more than one variety of the same language are spoken (for example, Spanish in the US), is the issue of which “version” of the language should be spoken so as to accommodate various countries of origin – normally referred to as “neutral Spanish”. I loved the definition they used because it captures the complexity of finding that middle ground while still taking into consideration the technical/financial implications and realities which we often face in our projects – “the neutral version of any accent is the version that offends the fewest people”

Happy Reading!

It seems one of the most frequent questions that come up when designing a new user interface is “how many options should appear on any given menu?” which depending on the answer is almost always followed by “how many levels down should the system have?”

And believe me, neither one has an easy or absolute response. As witnessed by some of the heated debates on the VUIDs list, the old standing guideline of “five options or less” was recently put to the test when Patrick Commarford and James Lewis from IBM published the article entitled “A Comparison of Broad Verses Deep Auditory Menu Structure” where the results seem to indicate that when comparing broad vs. deep menu designs, giving callers a single menu with many options (providing touchtone fallback) yields better results than using fewer options supported by submenus.

Aside from all the points, concerns, comments and objections raised by both the authors, the VUI community and other blogs, in my opinion I think it’s going to be really hard to reach a consensus if the main focus of the discussion if to agree on whether *5* is the right number of choices or not. The problem I see with trying to find that ‘ideal’ number is that a number by itself doesn’t mean anything. In this case, I think the devil is in the *context*.

In other words, any attempt to generalize what a good design should look like without taking into consideration the context of the application is not very responsible. We all know there are many factors that need to be taken into account when designing any system: caller’s age, demographics, type of application, caller’s objectives, business goals, etc.

Furthermore, when evaluating possible menu choices, the frequency with which each choice is needed and used by callers should not only drive their position within the menu but also the decision of whether or not the option should be in that menu in the first place (for example, if the top 3 choices on a menu are used 45%, 31% and 20% of the time respectively, then adding one more choices that’s only used 1% of the time should not be considered – in fact those calls are likely to be better handled by agents in the first place).
When all those factors are added to the mix, then an appropriate design *strategy* can be conceived.

For example, when thinking about the context of an application, imagine a system asking callers to choose a bird species – “And which type of bird is circling around you: dendrocygna, gelochelidon, herpethotheres, or tachycineta?”. In that scenario, unless you’re a birdwatcher, you’re likely to be overwhelmed even after hearing only 3 choices. The counterpart of course would be to ask for something so common and known that the number of choices in itself wouldn’t make a difference – “And which planet are you calling from: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune or Pluto?”

I definitively believe the industry should strive to find more answers to long standing questions, particularly when those responses can be backed up by real world data, but in this case, I think that unfortunately the answer to the question whether to go broad or deep on menus still is… it depends.

I recently ran across a series of posts and a SpeechTEK magazine article about a new service currently in Private Beta called Fonolo.

The premise is definitively very interesting. What this Canadian start-up is attempting to do is to replicate the concept of bookmarking and deep linking (process of linking pages in the lower levels of a Web site from a home page - or other pages - to help search engines index them) so common these days on the web. What this means for a phone user is that they don’t need to get to the application’s “home page” (aka Main Menu) every time to then have to traverse the phone tree to reach a specific destination…

According to their founder’s pitch, the way it works is that you “bookmark” a spot deep inside a telephone’s system tree. To do this, you go to the Fonolo’s website, find the Company you need, review a transcription of their menu structure, find the spot you need and click on it. By doing that, they call the company for you, navigate the menu up to that specific spot and call you back so you can continue your transaction from that point on.

How do they know what systems look like? Well, as noted in the VoIP weblog, they seem to be using a combination of voice recognition and human editors to generate “maps” of the interactive voice response system.

Aside from the obvious privacy concerns a service like this might raise, the hottest one in my opinion is the service they refer to as “Intelligent Call History”. Since in reality all your calls start from their home page, they are attempting to become something like a Google of sorts for “phone sites”. What I mean by that is that they would keep track of all the interactions you’ve had with a certain company (regardless of the phone you used), along with the actual recordings of those conversations!

In the web world, we’re all familiar with how certain companies keep logs that track your web habits which could then be linked to your IP address. The biggest difference to me is that they mostly keep track of where you’ve been and where you’re going, but not of what’s happening when you are there… and in this case, since you’re using them as a bridge to connect to a Company, how can you be sure those recordings (which may contain account numbers, PINs, etc.) are kept safe and out of anybody’s reach?

Presumably the advantage of something like this is that in case of a dispute, you could play back a recording from the actual conversation and prove a certain transaction happened. But is this benefit really worth the risk? Particularly when it is known that once it becomes available to the public, it will be ad-supported.

On the other hand, they have also expressed that their ultimate goal is to craft partnerships with those companies Fonolo has mapped so that those companies can notify them “when they change or update their IVR” to the point where they hope companies will indeed send transcripts of their IVRs so they don’t have to be mapped anymore

Again, I definitively like the idea of empowering users and allowing them to accomplish their task in the most efficient way, but I think a system like this would be a much better fit for an actual device feature (similar to the GOOG411 dedicated button now present in some phones) - which you could turn on at the beginning of a call and stop once you reach the spot you want to “bookmark” so that in the future your phone would simply repeat the steps you followed and get you to that same spot. And of course, rather than finding more ways to patch user-unfriendly architectures, companies should be looking at fixing the root problem, which in the short term can be somewhat addressed via the deployment of more SayAnything/ SpeakFreely-type menus so callers can say what it is they need right at the beginning of an application…

I recently got a link from Amy Quinn pointing out an article entitled “101 Five-Minute Fixes to Incrementally Improve Your Web Site” provided by InsideCRM, and though it might be helpful to go over some of those points in the list and hence suggest “21 Quick Fixes” (granted they might take a little more than 5 minutes) that can be adapted and applied to Voice User Interfaces and Voice Applications:

Copywriting

1. Tell callers why they should perform a task. “People are trained to follow a request, as long as you give them a good reason to do it”. Therefore, put yourself in your caller’s shoes (or ears), and make sure you’re not only offering something of value to them, but that you’re clear in why they should go through it (e.g. shorter wait times, 24×7 availability, etc.)

2. Make the most highly trafficked menus easier to listen to. If your system contains menus that are too long and you can’t reduce the number of choices, think about grouping some of them or break the menu up so it’s easier to process in short term memory.

3. Make choices meaningful. Be sure to change any vague or cutesy menu options to something more up-front, meaningful, that callers can understand (no jargon please)

4. Stay consistent. Check your prompts and terminology for consistency, or else the experience will seem unstable, unprofessional or patchy.

5. Stay simple. You just can’t beat that. Granted some processes are complex by nature, that doesn’t mean they need to be complicated. Strive for clarity!

6. Avoid making hollow promises. Including those callers are taken for granted nowadays, such as pressing 0 and expecting to talk to an agent.

7. Be concise. ‘Nuff said.

8. Go with what works. And if you don’t know what works, ask your users – that’s why Usability was invented for in the first place!

Usability

9. Make navigation consistent. Listen to your users, understand how they think and what steps they need to follow to complete a task, and then stick to that flow.

10. Never ask for more information than you need. Related to #1, this includes only requesting relevant information at appropriate times (why ask for the last 4 of the SSN when all you want is the hours of operation?). “When you get greedy for data, you’ll turn off some visitors”.

11. Add a search box. Or in the case of VUI design, think about adding a SpeakFreely/SayAnything-type of implementation where callers can say what it is they need right at the beginning of the call.

12. Use plenty of contrast. In our case, we’re looking for ’sound contrast’. You’ll need to make sure you coach the voice talent properly so as to not only get a good sounding application but also intonations that convey the right message and elicit the right responses.

13. Test it on real users. Oh, if we could just make this a law…

Accessibility

14. Modify color. In our case, we’re looking for ’sound color’. This might include having multiple personas and voice ‘sets’ to account for playback speed and other traits that are necessary to support multiple caller’s ages, audible ranges, etc.

15. Identify the language. Explore the use of alternative DNIS numbers for each language so as to avoid requiring language menus (“For Spanish, press 2…”) in which case don’t forget to make one of them the default.

16. Supplement navigational aids. Explore the use of professionally generated earcons that not only serve as branding elements but also have an impact on application usability (for example, a quick tone preceding the playback of a confirmation number).

17. Define shortcuts. Take advantage of any Usability and Tuning findings you discover that might involve real users employing certain keywords/phrases as shortcuts often enough to justify adding them as ‘hidden shortcuts’

Design

18. Place important information “above the fold”. In our case, either at the beginning of a certain task (e.g. providing account balance before attempting a transfer), or at the end of a sentence so as to facility short term memory recall, particularly if the information provided is new to the caller. (e.g. “Your due date is May 15th.”)

19. Reduce choices. If your system contains menus with too many choices, reduce the number of choices to the very minimum necessary for callers to accomplish their task and maybe add a “something else” choice for everything else.

20. Nix banners. Which in our case might also include unwanted advertisements and legal disclaimers (“This call may be recorded for quality purposes.”) whenever possible.

21. Stay consistent. Check to make sure the design and prompt recordings are not only consistent throughout the entire experience but also consistent with the system persona and user profiles.

How good is automation when it only works for part of the process? That’s what I often wondered while traveling since in many occasions I’ve found myself trying to use technology only to find out it didn’t save me from having to get in line at the airport. For example, sometimes you try to check-in online but get a message about having to stop by the counter to get your final seat assignment (aka someone overbooked the flight and will scramble at the gate to get you in). In other cases, you get an electronic version of the boarding pass yet have to go to a counter to check-in baggage.

Therefore you can imagine how happy I was when I read about Continental offering a real electronic check-in option, without the paper trail. Basically you get the equivalent of a boarding pass in the form of a two-dimensional encrypted bar code that gate agents and security personnel can simply scan.

Now, if they could just link that same code with an RFID tag attached to my luggage, I could also skip that lost luggage line…

The As if not enough discussion has been generated over this particular UI design tool on the VUIDs group, it seems the 37 signals post about how they don’t use Personas stirred yet another round of arguments on both their own site as well as in some other UI-related blogs such as Good Experience and The User Experience Soapbox.

I think they all provide a very interesting perspective and valid points both for and against the use of Personas (or Personae) as a design tool.

But for me, aside from it being just one more tool in our UI toolbox, the added extra business value that I find in them (which I didn’t see being brought up on those discussions) is how effective it is to help business owners and other business-side team members move away from thinking about “the user” in an abstract way.

In general, if you’re in the same room with five different people and you mention you want to do something to help improve the experience of their “users”, chances are each and every one of them will have a very different image in their head and idea of who this “user” is and what this “user” needs.

On the other hand, once all the information has been gathered and the right process has been followed to define a User Persona (or Archetype) for your system, then any future discussion takes a very different direction. You’ll notice how now new design decisions and arguments can be centered on your Persona.

It doesn’t have to be too complicated nor time consuming. For example, something as simple as defining a Natalie archetype might be enough: “Natalie is a real estate investor and has an ABC bank customer for about six years. She often calls her branch to get up to date information about interest rates and mortgage products. She normally calls from her home-office, so she’s in a quiet environment. She considers herself tech-savvy, so she likes automation, but time is precious to her, so if things aren’t working fast, she’d rather just talk to someone who can help her quickly.”

With this in hand, you’ll see how asking regular questions such as “how will the user be able to get her balance?” or “will the user need more information after a transaction?” turn into very relevant, in-context discussion starters such as “what’s the best way to offer Natalie the most up to date interest rates?” or “what information will Natalie need after choosing one of our mortgage products to make an investment decision?” respectively.

I understand the concern about using personas to replace talking to real people, but I like to think that they are not just the output of talking to real people, but a way for those people to keep “talking” for the duration of a project. So tell me, what do your users think?

Interesting article came out today on the New York Times regarding the efforts LG Electronics goes through when designing a new phone. Some others like Nokia are certainly not far behind, thinking about how personal communication will look like in the future via ideas such as Morph (depicted on the image).

I certainly wish more companies would apply similar these same principles they apply to design new products and consumer electronics but in the context of new services and consumer support. For example, they talk about participants being able to call a toll-free number to share their emotions about a phone they may be testing, or they are asked to draw pictures representing their mood when holding a phone. Can you imagine having something like this for self-service applications - being able to leave a message about how you felt about your phone experience, or being able to ask callers to represent their mood when using the system via pictures?

I can definitively understand the business motivation to be able to come up with innovative devices that draw people to spend money on them. But I would love to see a similar “hit-driven” mentality when it comes to self-services, having designers being not only aware of the latest usability and human-factors strategies but also about popular culture trends and user’s subliminal needs. What will callers want or need 3 to 15 years from now?

I loved the phrase they used to explain how companies like Motorola are now “forced to give consumers what they want even before they know they want it.” When was the last time your UI design strived to do that?

And I also felt our industry got reflected in Nokia’s statement “Design used to be inconsequential: just make it pretty, make it sell”, which in our case could probably be rephrased as “Just make it comply with requirements, make it work.”

So, a couple of final questions that kept me thinking about how our industry should evolve: what impact will eco-friendly concerns have on self-service? Will users be more willing to use automation if they see a real benefit in not having to drive down to a location of having to print-out and mail information hence saving trees in the process? Is it possible to combine the functionality our systems offer with something else (akin to them combining music players with mobile phones)?

It seems the current issue of BusinessWeek is focusing on Customer Service Champs in 2008 and “Consumer Vigilantes“.

Therefore it isn’t surprising to seem them cover a little bit of the history of the GetHuman movement and its evolution from a simple IVR cheatsheet into a full movement with the goal of “convincing enterprises that providing high quality customer service and having satisfied customers costs much less than providing low quality customer service and having unsatisfied customers.”

Even though the tone of the article seems to be a little gloomy and critical about how “page views on the site have dwindled”, I would argue that page views and sign-ups for an audio icon are not necessarily a reflection of the level of interest or impact GetHuman and the standards they’ve proposed have had so far.

I think that even though the approach to promote the standards might not have been the best one, it definitively has had an impact on how designers think about customer interactions, how companies are much more aware of the impact of caller experience in automated systems, and has paved the way to get the worlds of consumers, businesses and designers talk the same language and agree on long-term goals.

The part where I think the standards got a little disconnected from the real world had to do with the fact that in other technologies, standards can work in a vacuum as long as implementers or partners agree on them. In our case, I think that the fact that they are so closely related to customer experience and caller satisfaction warrants a much closer analysis of those standards in the context of those same caller’s goals. For example, standard #6 reads: “Callers should not be forced to listen to long/verbose prompts.”, but without any context, it would be akin to promoting a web standard similar to “Users should not be forced to read long/verbose sections of text.”… well, what happens if I’m reviewing a prospectus or accessing a white paper? Would offering that service disqualify me from being standard-compliant?

Furthermore, I think the other reason it cannot survive as an independent standard is because users very seldom limit their interactions to a single interaction channel (telephone in this case) but attempt to use whatever channel is more convenient based on their situation, location and past history with the company (internet, phone, branch, email, fax, chat, etc.). Therefore standards should consider those other channels as well so that the original goal of providing high quality service and having satisfied users can truly be accomplished in the context of the entire customer service experience.