Welcome to the Accuracy Test!

Thank you for your interest in the study. Please do not complete this study with mobile devices. A laptop or PC would be perfect. Here, you can find out how accurately you can read percentages from rose charts (round bar charts). Which chart makes better estimates?

Depending on how fast you are, the study will take between 10 and 15 minutes. Please, don't stay on one value too long.

Explanation Progress

During the study, you will be asked to read values from rose charts with differently spaced grid lines. Your task is to estimate the percentage shown by the dark blue fill level from the segment with the black outline.

0% would look like this:

100% would look like this:

Please be aware, that the position of the segment will change throughout the study. So, always check for the black outline, before making an estimation.

Explanation Progress

To submit your judgement, enter the value into the given text field and click the "Submit" button or press "Enter" on your key board.

Please enter integer values and only make a quick visual assessment. Do not try to make precise measurements, either mentally or with a physical object such as a pencil or your finger and work as quickly as possible.

Explanation Progress

To ensure that the system can show you exactly the same size charts as everyone else, you must first calibrate the system. To do this, take out any banking card, ID card or similar sized card (85.60 mm × 53.98 mm / 3.370 in × 2.125 in) and pull the gray handle on the right-hand side until the rectangular outline fits exactly around the shorter side of your card.

On the next slide, the study starts with the usual study questionnaire. Are you ready?

Explanation Progress

Preliminary questionnaire

Please answer the following questions. The answers make it easier to compare the study's findings with those of other studies. Your individual responses are kept strictly confidential, and providing this information is optional.

Age:

Do you require visual aids for your eyesight?

yes
no

Gender:

female
nonbinary
male
prefer not to say
other

Are you color-blind?

yes
no

What is your highest level of education?

no school certificate
prefer not to say
secondary education (Hauptschulabschluss)
intermediate secondary school (Realschulabschluss)
high school diploma/A-levels (Abitur)
professional training (Ausbildung)
Bachelors degree
Master's degree
other:

How often do you use charts and diagrams?

never
only once or twice a year
once or twice a month
once or twice a week
daily

Did you use radial bar charts (rose charts) as presented in the explanation before?

yes
no

How would you rate your expertise with rose charts?

never done
beginner
intermediate
expert

Do you know the difference between a pie chart and a rose chart?

yes
no

Thanks a lot! Ready? Then click the "Next" button to start the actual study!

Enter percentage value of the marked element (0% - 100%):

Test Progress

Changing

The rose charts will now change.

Please pay attention to the new rose charts.

Congratulations!

Did you have the feeling that you were getting better over time in one condition?

yes
no
I don't know

If yes, in which condition were you getting better over time?

Did the test exhaust you?

yes
no
I don't know

If yes, when did the fatigue set in?

after the first few stimuli
after half the test
towards the end
other:

Could you intuitively recognize the values without labels?

yes
no

If you completed the older tests, which grid would you prefer? The older or newer ones? The upper picture is the older version.

new
old
undecided

What kind of monitor do you have?

Do you have anything of note you wish to address? What was your favourite grid?

Welcome to the Accuracy Test!

Preliminary questionnaire

Changing

Congratulations!

Thank you so much for your participation and your time!