Author Topic: Gaming for science (Read 5332 times)

pixo · « **on:** October 14, 2013, 17:22 »

I am writing you to ask you for a little support in an experiment for better determining perceived color differences.
http://colors.htw-berlin.de/

The exact determination of perceived color differences is very difficult. Typically, color differences are calculated from color coordinates using special metrics (like CIE2000). Unfortunately, these distance measures do not always coincide with the perceived differences. We at HTW Berlin have designed an experiment with which we try to model better color metrics. The basic idea is to present color triplets and let people decide which of two colors is more similar to a reference color. Unfortunately the number of experiments is extremely high and the individual tests are rather "boring". To address this problem, we have designed a game, in which the players provide information about the perceived color differences.

It would be of great help if you could play our game for a little while and/or let other people know about it.

Thank you very much!

Ron · « **Reply #1 on:** October 15, 2013, 05:18 »

1291.7 Meters

Cool.

JPSDK · « **Reply #2 on:** October 15, 2013, 11:04 »

500 m, or something.
But what are you measuring? reaction time or colour vision.
BTW im colourblind.

pixo · « **Reply #3 on:** October 15, 2013, 16:18 »

Quote from: JPSDK on October 15, 2013, 11:04

500 m, or something.
But what are you measuring? reaction time or colour vision.
BTW im colourblind.

We are measuring which of two colors you think is more similar to a reference color.
From many answers we generate an improved color difference measure.

If you are colorblind you might mess up the results a little bit, however we average many answers.

JPSDK · « **Reply #4 on:** October 15, 2013, 20:47 »

Quote from: pixo on October 15, 2013, 16:18

Quote from: JPSDK on October 15, 2013, 11:04
500 m, or something.
But what are you measuring? reaction time or colour vision.
BTW im colourblind.
We are measuring which of two colors you think is more similar to a reference color.
From many answers we generate an improved color difference measure.

If you are colorblind you might mess up the results a little bit, however we average many answers.

We are measuring which of two colors you think is more similar to a reference color.
No, you are measuring the ability to handle the keyboard under stress and select colour similarities. Thats not the same.
If you are interested in data about colour perception, then why do you confuse the results with extra parameters? Your research will greatly suffer from these self introduced uncertainties.

Colour vision comes in many different forms in humans, and many ( probably 10%) have a very different colour vision. It is a factor that has to be considered. Have you considered how tetracromat mothers and their sons wold influence your research?
I suggest you look at wavelengths for colour receptor cells and make sure that you present an equal amount of adequate choices for each wavelength.
The point of making such research via the internet is that you can get a huge amount of data in an easy way. But are you sure data are representative, and if so, representative for what?

Fx monsters, skeletons and strange dark ruins does not interest me, and I found the arrow navigation cramped and difficult. You might more appeal to young boys sitting in the basement alone with the computer, and they might not be representative at all.

pixo · « **Reply #5 on:** October 16, 2013, 01:47 »

Quote from: JPSDK on October 15, 2013, 20:47

Quote from: pixo on October 15, 2013, 16:18

We are measuring which of two colors you think is more similar to a reference color.

No, you are measuring the ability to handle the keyboard under stress and select colour similarities. Thats not the same.
If you are interested in data about colour perception, then why do you confuse the results with extra parameters? Your research will greatly suffer from these self introduced uncertainties.
...

You are definitely right. However the problem is that measuring color differences perceived by humans (especially for larger color differences) is kind of unsolved. Even very sophisticated color difference measurement formulas do give results that differ from human perception.
You are also right that the conditions of this game (and different monitors and lighting conditions etc.) bring up additional uncertainties.
On the other hand from our results we could get up to now we did see an improvement in comparing different colors (which for example can be used for improved visual image retrieval schemes etc.). However the problem of this approach is that we need quite a few of votes from users to extract useful information. This is the reason why we have designed this experiment as a game.

If you are interested, here is the link to a paper of our experiment design and some preliminary results (however this paper is in German).
http://people.f4.htw-berlin.de/~barthel/paper/Barthel_Perceived_Color_Difference..pdf

Uncle Pete · « **Reply #6 on:** October 16, 2013, 11:15 »

Quote from: Ron on October 15, 2013, 05:18

1291.7 Meters

Cool.

Beats me, but I think I don't have time to concentrate on a game right now. 1230.7 Meters

Beppe Grillo · « **Reply #7 on:** October 16, 2013, 11:24 »

1 meter only, but with closed eyes

(Frankly I did not understood what to do with this game…)

elvinstar · « **Reply #8 on:** October 16, 2013, 14:36 »

4189

disorderly · « **Reply #9 on:** October 16, 2013, 14:50 »

ShadySue · « **Reply #10 on:** October 16, 2013, 15:09 »

I did it a few times, but spent so much time trying to decide if the hue of one trumped the tone in the other that I got stopped without having a clue why.