For questions involving physical interfaces and interactions with "real world" objects.

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2
votes
4answers
121 views

Tracking what users are drawing on a piece of paper in real time

As part of our research in an HCI project, we need to track what users are drawing on pieces of paper in real time. Due to some requirements, we cannot replace the paper with anything digital. What we ...
12
votes
4answers
8k views

Why is the accelerator pedal different

The question is in reference to cars. The accelerator pedal is more elongated than the other two and usually softer as well. Why?
77
votes
5answers
10k views

Why do numpads on keyboards and phones have reversed layouts?

I came across this on the web. It's supposed to be funny, but we all know better :) So, why are the numpad layouts different, and what are the reasons behind each?
68
votes
10answers
16k views

Why is sugar not in a shaker?

At most restaurants that I've seen, the middle of the table is set up with: One salt shaker One pepper shaker A small dish of a few sugar packets Why isn't sugar put in a shaker like salt and ...
4
votes
2answers
176 views

Conditioning users

Playing around with my heat in my new Volkswagen GTI, I noticed when you press the heated seats button once, it starts you off with maximum greatness (3 / 3) press it again it goes down ( 2 / 3) (1 / ...
10
votes
2answers
568 views

Is duping the consumer really a good business practice?

I have had this at the back of my mind for sometime and I believe UX is the proper place to post this though I may not phrase the question right so please chime in if you have suggestions! There are ...
1
vote
1answer
109 views

How to avoid people from using the coffee spoon into the sugar jar? [closed]

Do you have any creative ideas how to avoid people using the coffee spoon into the sugar jar?
10
votes
6answers
7k views

Why do some cars have the fuel door on the passenger's side?

Many cars, such as the BMW M3 pictured below, have their fuel door on the passenger's side of the car. I do not understand the reasoning behind placing the fuel door opposite the driver; placing it ...
10
votes
1answer
207 views

Why are stairs not replaced by ramps?

If ramps allow accessibility to a larger number of people as opposed to stairs, then why are stairs more common than ramps in public buildings (or buildings in general)? Comparing a reasonable angle ...
7
votes
3answers
352 views

Why is User Experience treated different in digital and physical stores?

When shopping online there is (from my experience) a well thought through design of all the steps from finding the product(s) you want and need to the check out process and purchase of the product(s). ...
118
votes
9answers
13k views

What's the purpose of “This page is intentionally left blank” we see in books?

What's the purpose of "This page is intentionally left blank" we see in books? Why not just leave the page blank and write nothing on it?
35
votes
8answers
4k views

Why don't chinese teacups have handles

I am mystified over the difference between an English tea cup and a Chinese tea cup. The difference is that a chinese teacup does not have a handle/"ear" while an English teacup does have a ...
4
votes
3answers
2k views

Why most of the microphones are placed on the left of headsets / headphones?

I've noticed that the mayority of the well-known brands (Sennheiser, Logitech, Plantronics, Razer, SteelSeries, Audio-Technica, Phillips, etc) tend to make headsets with the microphone on the left, is ...
42
votes
7answers
6k views

Why do ATMs need to take your card in?

In every ATM I've seen, the card is "swallowed" by the machine, and returned at one point or another (or not, if you type the wrong PIN 3 times or whatever). This leads to people forgetting the card, ...
26
votes
3answers
4k views

The reasoning behind book dust jacket while there is a hardcover

I am wondering, what is the reason behind adding a dust jacket when a book has a hardcover as well. Initially, the purpose seems to be obvious: to protect the hardcover below it, so that it does not ...
4
votes
2answers
465 views

Why are TV bezels there?

Isn't it true that LCD display units only have ribbon wirings on their bottom (or any one side)? So, this should leave the other sides from covering up their edges, shouldn't it? I have read somewhere ...
3
votes
4answers
118 views

Alternative to power-hungry screen displays

For devices that run on a battery, the screen is the component that drains the the battery the most. So I began to wonder if there is an alternative. Has someone ever tried another type of interface ...
8
votes
7answers
3k views

Why electric car windows can be automatic for driver's window and manual for others?

I'm European and I don't understand the logic behind electric car windows commands. In a lot of cars, a driver can fully open the electric window on his side with a single push. But if he wants to ...
9
votes
5answers
313 views

What perceptual mechanism governs this road indicator design?

In this roundabout design, arrows(?) point against the flow of traffic (traffic flows along on the right side of the road). You can particularly see it in the second image. They indicate that you ...
5
votes
3answers
905 views

How long should automatic doors delay closing?

Automatic doors have a sensor that detect whether people are present, and when there are none, and after a delay, the doors close. How long should that closing delay be? Does it depend on factors ...
6
votes
2answers
362 views

Does drawing a dash across the numeral 7 (seven) increase readability?

The RBRC battery recycling logo was recently updated to add a dash to the final digit 7 (seven) in the phone number: Does this increase readability? In what situations, if any, is writing the ...
25
votes
7answers
7k views

Why does the Redbox machine have barriers around the credit card swipe reader?

Perhaps you've seen one of these before. A couple of inches above and below the magnetic stripe reader are protrusions that allow just enough room to swipe a credit card. The barriers are a ...
1
vote
5answers
303 views

ALL CAPS fonts for industrial use

I'm on a plane and noticed the use of all caps on the flight crew phone: Generally I found the phone very well designed: it has rounded colors, decent contrast, is unobtrusive for passengers, and ...
14
votes
4answers
3k views

Why do manufacturers of most small/medium refrigerators default the door to swing counter-clockwise?

Most people are right-handed, right hand is handy. However, most small/medium refrigerator doors swing counter-clockwise (top view) by default. This forces you to move/arrange heavy things with your ...
1
vote
3answers
159 views

Laptop usability design flaw from a big corporation

A few months ago I wanted a new laptop, so I ordered it from a big brand considering its solid features (like core-i3, 4 gigs of RAM, etc.). The laptop is perfect and runs well, but it has a small but ...
15
votes
6answers
950 views

Why do stairs have overhangs?

Most stairs (at least here in the US) have an overhang or 'nosing' where the edge of the stair protrudes over the riser: I've heard different reasons for why the nosing exists, but I've not been ...
68
votes
12answers
9k views

Do signs printed on the road offer a significant advantage for the user over signs on a post?

I was driving earlier today and I came across a stretch of road that didn't have signs for the speed limit but instead had it written on the road like so: Image source It got me thinking that it ...
40
votes
4answers
4k views

Why are messages on the road printed in reverse?

After reading this question, something occurred to me that I've always wondered - but never thought to ask. Why are road messages/signs printed in reverse? (source https://xkcd.com/781/) Anytime ...
3
votes
3answers
589 views

What is the psychology behind road markings on lanes unaffected by speed cameras?

In the UK, speed cameras are usually accompanied by white striped lines on the road. I have always assumed that was a visual reminder to the motorist to "watch your speed- it's about to be checked". ...
0
votes
1answer
95 views

Is there a human advantage to painting heavy equipment (aka “baggers”) bright yellow?

Is it just branding, decoration, or is there an actual human-centered reason for it?
6
votes
7answers
3k views

Why are soft drink bottles round, and milk cartons square?

EDIT: The coke bottle I am referring to in the question is 1.25L. Why are soft drink bottles round, but milk cartons square? The milk carton is more utilitarian, being more space efficient, and ...
22
votes
5answers
2k views

Why do public restrooms place the paper holders so low?

Most public restrooms that I've used (in the US) place the paper holder very low, with the bottom of the roll (where you can grab the paper) below knee level when seated. This is not true in the ...
14
votes
2answers
451 views

What was the reason behind total transition towards wide screen displays by the manufacturers?

I often hear complaints by users who are not satisfied by the wide-screen monitors and prefer traditional screen ratios of 4:3 and 5:4. Unfortunately, such monitors now are quite rare and the laptops ...
3
votes
3answers
261 views

Why do we say that door knobs afford twisting?

So many basic discussions of affordances begin with the example of door knobs affording twisting. It seems to be the second example used in Norman's 1988 definition, even. However a symmetric round ...
64
votes
9answers
7k views

How to convey: “don't move until the task is done!”

Our local public transportation system uses electronic cards (something like RFID technology) to validate rides. Users enter the vehicle and place their contactless card against a reader, and a beep ...
6
votes
1answer
138 views

Using warnings to reduce printer waste

I've seen where businesses try to limit printing usage by limiting users from printing more than 100 or so pages per month with an application like this: download bmml source – Wireframes ...
4
votes
1answer
144 views

The usefulness of home appliances sound notification?

In our homes we now have home appliances such as a dish washing machine, a microwave oven, a washing machine, a tumble drier. Every one of these appliances makes a little sound notification when it's ...
89
votes
12answers
20k views

Why do showers have “hot” and “cold” knobs rather than “temperature” and “quantity” knobs?

I do not understand the advantage of the popular "hot" and "cold" controls in showers, as opposed to "temperature" and "quantity" controls. Is it simply because the latter option is harder to ...
13
votes
16answers
2k views

How can I get people not to put trash in recycling bins?

In my office space we have a main trash can and "recycling" can in the break room. They are simply two bins, with the same color, that are hidden in a cabinet. Outside of the cabinet are two ...
18
votes
8answers
5k views

Why do light switches find themselves OUTSIDE the room they light up in some European countries?

Okay, to be fair my experience is mostly with Poland, though I have observed this electrical interior design decision in a few neighboring countries while travelling, but can't generalize there. ...
1
vote
2answers
281 views

Why are elevator doors always too small? [closed]

I noticed that elevator doors are always narrower than the compartment, so people get jammed up trying to exit. Why don't they just design elevator doors so they are wide enough for everyone to exit ...
4
votes
2answers
129 views

UX to consider on a business card design

On a UX stance, what are the best practices to consider when designing a business card? I've done some research in order to find some that I might not have considered and I have to admit that I've ...
1
vote
5answers
316 views

Why to loosen always by rotating it counterclockwise and to tighten by rotating it clockwise?

For example: Screw / bolt Bottle design Why this intuition works for most people? Does it have anything to do with the right-hand rule?
2
votes
2answers
206 views

Why do revolving doors rotate counterclockwise?

In all my life I have never seen a clockwise revolving door. How did counterclockwise become standard?
14
votes
4answers
1k views

Why are double-handle taps still installed in households and public washrooms?

I'm wondering why double-handle faucets are still installed in sinks, bathtubs, etc in newer places of dwelling as well as public washrooms. From reading, they appear to be easier to install, but ...
-3
votes
2answers
3k views

Why AMBULANCE is written as ECNALUBMA on emergency vehicles?

Why is AMBULANCE sometimes mirror written on emergency vehicles ?
3
votes
2answers
241 views

Is it really a bad thing to place an ad TV in front of the stairs?

We have the following room arrangement with a plan on a 40 inch TV mounted on the wall. download bmml source – Wireframes created with Balsamiq Mockups In this place people usually walk ...
1
vote
1answer
138 views

What is the purpose of jackets having small zipperless back pockets just below the neck?

I was a little bit surprised to find that my Bench-branded 100% polyester jacket had a little zipperless back pocket just below the neck, especially since placing something like keys there would make ...
5
votes
2answers
162 views

Are dial format speedometers more effective than numeric speedometers?

I recently criticized a sketch of a automobile instrument cluster concept that indicated speed with a bar gauge and a numeric readout. I and many others suggested that a dial speedometer was easier to ...
34
votes
12answers
7k views

Why do speedometers (in the US, at least) go so high? [closed]

Typically one doesn't drive much faster than 80 MPH. Even in an emergency passing situation, it would be extremely rare to drive more than 100 MPH. In fact, as far as I know many cars have governors ...