HNHacker News
TopNewBestAskShowJobs

wittjeff

209 karma · joined May 24, 2010

accessibility technology consultant and user experience researcher
submissionscomments
wittjeff··on Ask HN: Raspberry Pi Startup Ideas
Relatively hack-proof internet interface for wifi security cameras. If someone breaks into the house and steals all my gear (including the cameras), at least I wouldn't be losing another $2-400 PC.
wittjeff··on Ask: Good phone number service providers for startups?
Also check out Twilio.com and their OpenVBX.
wittjeff··on Ask HN: Ecommerce startup - Shipping and Return labels?
Check out http://www.endicia.com/Products/.
wittjeff··on Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos
Watching Ocean's 11 last night it occurred to me that other contexts in which intelligent multi-camera stitching might be profitable are casino security and retail loss prevention.
wittjeff··on Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos
I had been thinking about something like this, but in the context of recreating riot crime scenes. After the last riot in Toronto the police received over 1M stills and thousands of hours of relatively low quality cell phone video. The main task for them is to connect different shots of individual offenders over time to build a) a coherent story demonstrating premeditation, b) an unbeatable description and connect it to some identifying info that might not necessarily be present at the exact time of the offense.
wittjeff··on NASA creates groundbreaking super black light absorbing material
^f Tycho. sigh
wittjeff··on Poll: Do you take drugs (to help you program)?
Which energy drink? I've been trying every new one that comes on the market (except those that contain sucralose -- blech).
wittjeff··on 5 days before our YC interview we've changed our idea. Help us prove the market.
Seen patientslikeme.com?
wittjeff··on 5 days before our YC interview we've changed our idea. Help us prove the market.
+1 for wanting to use it for figuring out food sensitivities.
wittjeff··on 5 days before our YC interview we've changed our idea. Help us prove the market.
I don't know how you intend to do your data analysis, but...

I have had an idea for a smartphone app on my Big List for years. This app would implement lag-sequential analysis (see for example http://www2.gsu.edu/~psyrab/references.pdf). I haven't actually used it (which is part of why I have procrastinated this one), but my understanding is that LSA is basically a chi-squared analysis with a time function. Chi-squared compares expected vs. actual incidence of something. So LSA would look at expected vs. actual incidence of X happening following Y. The prototypical test would be to prove/disprove that chocolate milk makes kindergarten kids more violent. But you could (as I envisioned it) generalize it to sniff out all kinds of factors that might systematically precede migraines or whatever.

You'll also need to explain to people that a negative result might not be a reliable one unless you get a lot of data and record all variables reliably.

I'm not sure how much my app idea overlaps with yours, but I will cheer you on in any case.

wittjeff··on Response Times: The 3 Important Limits (199X)
From a few years of testing and several hundred mainstream users I would add to this: 4 seconds -- the trusted progress period: the approximate amount of time you are allowed after the user clicks on something, after which some users begins to suspect that perhaps things are not proceeding on track as expected.

Example: User clicks on a web page link. Half of the next page is drawn (clearly not finished). After about 4 seconds without visible progress, the user will assume that the process has failed. A longer (>4 seconds) page download/draw may be accomplished with progressive feedback.

Example: User enters some text and clicks a Search button in a desktop app. A thermometer control shows initial progress, then stalls. Again, you get ~4 seconds in (apparently) stalled state before the user starts thinking something may be awry. (Time to actual give-up varies more).

Interestingly, lower-resolution progress feedback that includes animation is vulnerable to the same threshold. So for example if instead of the progress thermometer we simply put up an hourglass cursor, we can assume that some users will start to question the integrity of the process after ~4 seconds of watching the hourglass do its usual thing. Likewise with a barber pole/ thermometer that spins but doesn't grow. Normal animation, or rotating slide shows, or whatever other easy-to-display distractions that we have come up with, don't actually address this fundamental problem. I believe habituation teaches even many naive users that those indicators cannot always be trusted. Trusting the integrity of a process, after that 4 second threshold, requires something progressive or novel. This makes getting through any process that takes an unknown amount of time but more than 4 seconds a tricky unsolved problem. I believe a higher level of novelty would extend the threshold considerably, but the real key is demonstrating that the process is still making tangible progress toward a known end goal.

wittjeff··on Show HN: My weekend project, tracking the services you can't have in Canada
Great idea! Are you expecting the forum to be used for references to the next best alternatives that are available in Canada? That's what immediately comes to mind. But then I wonder if those topics would quickly scroll off the list.
wittjeff··on Why incorporating my startup was my worst mistake
I believe Microsoft was a Delaware corporation for many years -- at least for several years that I worked there in the '90s. I don't know why they changed.
wittjeff··on Ask HN: What is best short word meaning "in process of development"?
Other suggestions: "coding" "under construction" (we have a commonly recognized symbol for that too) "building"
wittjeff··on Ask HN: What is best short word meaning "in process of development"?
If I understand your model correctly, the word you are looking for may be a derivative of "developing" or it may be something like "building." You may also benefit from using some qualifiers in your descriptions. Example: "1) Proposal / Component Request (that's you) -> 2) Proposal Review and Acceptance (that's us) -> 3) Component design & Development -(that's both of us) > 4) Component Release / Public availability."

My confidence in this is low because I'm not really sure what your business model is.

wittjeff··on Show HN: BulletinBurst - A lean online press office
Suggestions for the US version: 1) Move the banner up ~ 5 pixels 2) Make the banners auto-rotate on a slow timer (15s?) 3) Add alt-text to the banners to make them more accessible 4) Move the Select Category drop-down to the right of the Select Category label, or get rid of the label 5) Make the hover highlight color for the top-of-screen menus have greater contrast with the background color. 6) The font used in the pricing grid is a bit overcrowded. Also all-caps for anything but "FREE" is a bit overzealous. 7) In the About page, put about 5px space between the art and the text. 8) You need alt-text for the art there too. 9) If you want to set up a long-term relationship with clients, you should introduce yourselves more thoroughly. Make a Team page.
wittjeff··on IPad stylus -- Kickstarter project
In the early '90s when I was a usability specialist at Microsoft I did a laborious usability study (hired several temps to enter text using various methods for hours per day, over multiple days) comparing pen input vs. OSKs and got some counter-intuitive results. Essentially OSKs are much faster than handwriting even under optimal conditions. If it takes 10 seconds to enter a string with an OSK, it'll take ~15 seconds to write it using block letters. That's not counting any time needed to correct errors, which will tend to make the writing input even worse. When I asked participants after the study which method they thought was quicker, most assumed the pen-based writing was. Keep in mind that they spent 1/3 or more of their time correcting errors, so the writing may have taken twice as long as the OSK, yet they didn't perceive as such. Of course their statements could have been a demand effect, but it generally corroborates my main point.

I've read a pile of published usability reports on other text entry methods, such as chording keyboards, and they all show essentially the same thing. Letting fingers extend to hit a fixed close target is hard to beat, and the optimal amount of pressure needed is very small (though perhaps not zero).

My theory is that it takes less mental effort to write than to use an OSK, so the OSK is perceived as being slower. With the OSK the level of mental effort is mostly high (mostly visual search), with periodic dips (hit the key). With pen-based writing it's the opposite -- mostly automated / low-cognitive-effort behavior with periodic thinking about what to do next.

I read a quote from Jobs somewhere recently where he said something like, "the problem with handwriting is that it's just so darned slow" so that makes me think that Apple may have done a similar usability study.

I don't think OSKs are ideal. I'm continually impressed by the steady flow of innovations in text-input methods. But pens have their own usability baggage even outside the limitations of handwriting.

wittjeff··on Computer Workers exempt from Overtime Pay
This was a result of a Republican amendment to the Clinton-administration increase in the federal minimum wage (around 1992 - 1995. Subtitled "A bill to increase the take-home pay of workers..." or something like that, if I recall correctly. It should be available at http://thomas.loc.gov but the site isn't terribly easy to search.). Another Republican amendment to the same bill decreased the minimum wage for workers who receive tips to $2.XX (I can't remember exactly.)
wittjeff··on Show HN: My "semester" project: cab sharing made easy
Black-on-dark-grey is a bad combination for aesthetics and accessibility.

Speaking of accessibility, blind people are big users of cabs. So that might be another market to focus on.

wittjeff··on Show HN: My "semester" project: cab sharing made easy
I'll dig deeper into your UI in a minute, but have a usage scenario for you to consider. Suppose this thing catches on in the Las Vegas tourists context I mentioned earlier. There might be multiple people queuing up with the same origin and destination. How do you identify your rideshare partners? Second question: Suppose there are people who have heard of this now-ubiquitous app but gasp don't have a smartphone with them. Can they jump in and share a ride? For both situations I think it might be good to have a big distinctive screen-covering photo of the place you're going (if the destinations are among a top list), or the destination spelled out in text with distinctive foreground/background pairs. I'm thinking of this as akin to buying theatre tickets in front of the venue just before a show. Then the prospective partners who have phones can stand around with their smartphone screens not-so-subtly visible, and other prospectives (having smartphones or not) can scan them visually very quickly instead of asking a bunch of people "are you my ride"?
wittjeff··on Show HN: My "semester" project: cab sharing made easy
Speaking of use at conferences, I have wished for something like this while standing in line (with hundreds of other people) waiting for a cab at Las Vegas airport. Too frequently they have under-loaded cabs going to the same hotels only minutes apart.

In Vegas it scales up further though. You have lots of people hopping from hotel to hotel to see shows etc. So if I want to get from the MGM to Bellagio to see O (particularly at predictable intervals before shows start), it's a good bet a bunch of other people will too.

wittjeff··on Ask HN: electric kettle, hacker recipies.
Tips for minimizing the food budget: - Cut your meat intake in half or lower. It's expensive, and you'll feel better. Avoid red meat in general, as it is most expensive. Eggs are the cheapest protein. Tuna is probably second. - Generally speaking you should consider rice, potatoes, oats, and beans the base of your diet. They're all cheap if you buy them unprocessed. - Get in the habit of diluting everything that is processed by half. So if you get a package of cheesy rice mix for 1 euro, add a cup of plain rice to it. Likewise with Tuna Helper, etc. I don't know why they put so much spice mix in those things. Also you can do this with canned soups -- add a can of beans or veggies, and you have two cans of soup for a lower price. - I would encourage you to cut out sweetened soda all together, as I believe it has almost no nutritional value and is probably the leading cause of obesity, but if you can get the large containers (they sell 3L bottles over here) on sale they are probably the cheapest source of calories. - Make your own coffee and tea. Get a thermos if you don't have one. - Consider milk a luxury. It is relatively expensive for what you get out of it.

Cutting out all of these things that are above-average cost, you may wonder what damage it will do to your health. I'm a firm believer that optimal nutritional health comes from 1) greatly lowering the excess bad stuff and 2) eat green things. Really, anything loaded with chlorophyll is probably good for you, and will fill in the gaps in your nutrients. I'd bet you could live on rice and spinach alone indefinitely.

When I was in college I a single-burner hot plate and a 1-qt non-stick sauce pan for just about everything.

So basically the cost-minimizing technique is to eat as most of the Chinese do.

We have a few discount stores over here (I'm thinking of one in PA, but I know of another in MT) that sell dented cans, out-dated (but perfectly good) boxed food, etc. for roughly half of regular retain price. It's the same thing you'd get at a regular grocer, but the packages aren't right. If you have one near you it could save you more than any other diet-changing strategy.

wittjeff··on Cracking helloCAPTCHA
FYI: (a little outdated) http://www.w3.org/TR/turingtest/ Anne Taylor at NFB.org in Baltimore can suggest an accessible one. I'm afraid I don't know which is considered best right now. If you have something really new I'd love to get a look at it from the accessibility perspective.
wittjeff··on Ask HN: Review my startup - Jaxified
+1 re the black-on-blue text. I found myself reading the "How It Works" before the "Build and measure your blog".
wittjeff··on Show HN: Phoneify - 20 hours with Rails 3 & Twilio
+1 for great execution. Nice visuals. Did you do them yourself? If not, a reference would be great.

+1 for needing pricing details upfront. I'll suggest $.10/call or SMS but I might pay up to $.50 for my application. I could be using this within a couple of weeks for a project I'm building.

But... You must have noticed that there's another company using Phonify.com (no e). You're going to get in trouble with trademark infringement if you launch with this. Seriously, it's an easy call, and I wouldn't say that your space in the commerce realm is too far apart to matter. [insert flashing red light] Now maybe the other company won't have a trademark, in which case maybe you could use this, but then you can't trademark it yourself. Given the potential name confusion (I just typed their URL when I wanted yours a minute ago), I'd think hard about this before charging anyone for anything.

Some PHP sample code wouldn't hurt.

There are several Wordpress plugins for signing up for an email mailing list. Adding your service to that would be compelling. Note that the Wordpress people have a strong interpretation of the GPL (that is they assert that all plugins are covered under GPL and must be $free) though. But maybe that doesn't matter if you're charging per call.

Going further down that train of thought, I'm thinking someone might duplicate this functionality for Wordpress and just require the user to have Twilio account (as some folks require an Amazon storage account, or whatever). Twilio signup is a low bar to jump, so I'm thinking this is a reason to keep your fees low.

wittjeff··on Cracking helloCAPTCHA
It looks like they aren't accessible to blind or low-vision people, so I'm going to discourage you from using them in any case. I might add color-blind too for some of them. Clever, but inaccessible.
wittjeff··on Offer HN: I will build what you design
If you intend to pick one among the applicants/replies below (as the other kind contributor is doing), I suggest you make that clear up front. Your post makes me think that perhaps you're casting a wider net, though I'm sure no one would object. :)
wittjeff··on Offer HN: I'll build it, you design it
Do you have an algorithm for this, or an app idea? Some folks at the MIT Media Lab worked on this concept in the early 90s. See for example http://web.media.mit.edu/~lieber/Lieberary/Letizia/AIA/AIA.h.... I mention it only because it might be relevant intellectual property; I don't claim to be up to date in that area.
wittjeff··on Offer HN: I'll build it, you design it
I'm definitely open to sharing code. I also have friends in the UK who have deep experience in this area and can give advice on setting up a non-profit over there.
wittjeff··on Offer HN: I'll build it, you design it
IT for the Blind. (non-profit) Basically like Kickstarter, but applicants will be asking for (pooled) funding for always-too-expensive technology that helps overcome vision problems. Check out Humanware.com for example of this kind of gear.

The main problem with this kind of technology is that it remains very expensive, even as tech in general keeps getting cheaper. A CCTV that would help Grandma write checks and read Christmas cards may cost $1500 on the low end. The market-dominant screen reader applications have been around $800 since I was an accessibility program manager in the 90s. The main problem is that with such a small market they don't get good economies of scale. Some have estimated that we may currently reach as little as 5% of the affected population, and cost is a big factor.

Fundraising for Guide Dogs for the Blind, and their many clones, is ridiculously easy. It's a pitch everyone can understand. Well, guide dogs get many blind people outside their house, but technology lets them keep middle-class jobs, interact with the world via the internet, etc. In terms of fundraising, it's a fairly powerful pitch, but there is no equivalent central non-profit that just focuses on IT. Most of the non-profits out there focus on skills training or fighting the causes of blindness. IT for the Blind will first determine whether applicants can get funding from schools and employers (as required by law), then pass on the many requests that aren't addressed by existing sources.

I've got board members / founders and a UI spec, but haven't been focusing on this one because my consulting work has been keeping me busy. I'll be able to work on it full time in the summer, and having a MVP would make initial donor fundraising much easier.

By the way, you should assume that donated work would be tax deductible, if we get 501(c)(3) status this year. :) Thanks!

← PreviousPage 5 of 6Next →