A Mental Model Gone Awry

My password manager of choice is Agile Web Solutions’ 1Password, which holds all of my sensitive information like passwords, credit card numbers, banking data, etc. When you log into a website for the first time, 1Password can automatically grab the username and password and lets you add them to the application’s encrypted database via a little toolbar right inside the browser.

In case this automatic process fails, you can save the login credentials manually. And, for a while, I simply could not figure out how to use this feature…

The application’s documentation describes the manual-save function as follows:

Some websites perform some “tricks” that prevent 1Password from detecting that a login occurred, so the Autosave bar does not appear. When this happens, you can manually save the Login by selecting Save Login from the 1Password toolbar menu

Note how this explanation does not mention at what point in the login process you should select the Save Login command.

When using the auto-save feature, 1Password will bring up the corresponding toolbar after you have entered your credentials and hit the submit button. Based on that experience, I assumed that this order of actions also applied when saving logins manually. But when I tried this approach, 1Password told me that “[n]o logins [were] found on this page.”

So I tried choosing the Save Login command before entering any data, expecting to somehow “arm” 1Password for magically intercepting the login data — even though it had failed to do so while unsuccessfully attempting to auto-save those very credentials. While this did not bring up any error messages, the resulting database items were empty.

And of course they were empty. When you think about it for a moment, there is only one configuration in which 1Password can definitely harvest the login credentials from a webpage: that is when a) that login information has been entered into the login form on the page and b) the page containing the form is still being displayed in the browser.

Hence, the proper way to use this feature is to:

  1. Enter the credentials
  2. Select Save Login
  3. Hit submit to log into the website

In hindsight, it is painfully obvious that this is the only process order that makes sense. Until my mind adapted the mental model it held for this process, however, I simply did not “see” this solution.

Because 1Password does such a wonderful, near-magical job of compiling data from websites under normal conditions, I was expecting it to always execute something complicated “under the hood.” Consequently, I also assumed that I needed to do something non-straight-forward, more-complex-than-usual when the application needed a little help for saving a specific site’s credentials.

Which goes to show that, sometimes, even perfectly good designs cannot prevent our mind from coming up with mental models that are plain wrong.

In this specific case, though, there is a way to prevent others from running into the same problem. Namely by extending the application’s help file to state “…you can manually save the Login by filling out the login form and, before clicking the Login button, selecting Save Login from the 1Password toolbar menu.”

Parking Meters That Prefer Cards Over Coins

More often than not, paying for a parking spot is a tedious affair: either you have to (hope that you) have enough coins on you, or you are confronted with a ticket machine whose designers were led more by the technical constraints inside the machine, than by the requirements of the user standing in front of it.

The experience with the parking meters in San Francisco is quite different: while the meters do accept coins, they also have a slot for pre-paid parking cards, which are available in $20 and $50 varieties.

Card in, observe, card out, done

To pay for your parking spot, you insert the card into the corresponding meter. At first, the display will show the current balance on the card for a few seconds, and then change to show the parking duration.

As long as you leave the card in the meter, the parking duration will increase in 7 or 8 minute increments (think “rounded 1/8-hour chunks:” 8, 15, 23, 30, 38, etc). The pace at which this happens is slow enough so you can easily follow along, and yet it is fast enough so you don’t feel like you have to excessively wait for the machine.

Once the meter displays your desired parking duration, you pull out the card, and you’re done. (On the next photo, note the chip symbol next to the card slot, indicating the orientation in which the card needs to be inserted.)

After I had taken the photos for this article, I realized that 38 minutes were not quite enough for what I was planning to do1, so I inserted the card again to see whether I could top up the meter, and it worked just fine.

Also works with parking ticket vending machines

In most cases, a dedicated meter is mounted right next to the corresponding parking spot. In others, you will have to pay at a vending machine, which adds a few extra steps, both in terms of walking up to the machine, as well as using it. Overall, though, this is the simplest and most convenient way to pay for car parking that I have encountered so far.

If you’re going to visit San Francisco and decide you want to buy one of these cards, you can find them at drugstores — I bought mine at the cosmetics(!) counter at a Walgreens — or via mail order directly from the San Francisco Municipal Transportation Authority.

Update 2010-10-07: Lars Feyerabend made an interesting comment about the chip symbol on the parking meter’s front panel:

I think the arrow is ambiguous. Representing the card or does it point to the side of the slot the chip should be at?

My intuitive interpretation of the symbol was that its arrow indicates the side that the chip should be on when inserting the card, i.e., the slot’s “south-western” edge.

Then again, the following picture was taken before the three others shown above, and as you can see, I was about to insert the card with the wrong side up. I had simply ignored the symbol altogether.

After musing over Lars’ comment, I wonder whether the chip symbol is as helpful for first-time users as I originally assumed. The good news is, though, that the meter will display an error message if you insert the card the wrong way, and does not fail silently.


  1. This being San Francisco, it did, of course, have something to do with eating out, and I hate being rushed when having good food. 

Making Toilet Paper Rolls Easier to Use

This just in from the Department of Usability Improvements in The Most Unusual Places: the manufacturer of this toilet paper has come up with an ingenious design for indicating where the roll “starts:” at the point where the end of the paper trail is glued on, this roll sports a little fold.

This fold makes it easy to see where the roll starts, and pulling on the fold conveniently breaks the glue bond.

What’s more, the fold can also be easily found by groping around for it. This not only makes it easier to use for the vision-impaired, but also improves its usability when used in one of the enclosed multi-roll dispensers often found in public restrooms.