Brightness Comparison Experiment

Instructions: Please, press F11 to allow full screen mode.

WARNING: Do not use Firefox explorer.

Goal: You will be shown pairs of images depicting a living room containing a lamp with a visible lightbulb on a table.

Your task is to select the image in which the lightbulb emits more light. For example, in this photo, the lightbulb on the left emits more light. In other words, the light bulb on the left has a higher wattage.

Procedure: You will begin with four practice trials to get familiar with the task.

In each trial, two images will appear side by side on the screen.
Choose the image where the lightbulb is brighter, meaning it appears as emitting more light. Question: Which lightbulb emits more light?
Use the left or right arrow keys on the keyboard to indicate your choice (right or left image), and press the space key to confirm.
After each selection, a noisy image will briefly appear before the next pair is shown.
Repeat steps 2–4 until all trials are completed. The number of remaining trials will be displayed on the screen.

WARNING: There are attention check comparisons, please pay attention to the instructions.
Failing to comply may result in exclusion from the study.

Age: *

Gender: Which gender do you identify with? *

Do you have any vision condition or disorder (e.g., myopia, presbyopia, etc.)? *

Do you wear corrective glasses or contact lenses? *

Yes No

How often do you work with high dynamic range (HDR) images or tone mapping techniques? *

To what extent are you familiar with the field of computer graphics? *

Have you had training or education in photography? *

Yes No

How would you describe your familiarity with photography? *

How frequently do you adjust visual properties such as brightness, exposure, or color in photos or videos? *

Have you had training or education in painting? *

Yes No

Have you had training or education in illustration? *

Yes No

Instructions: Please, press F11 to allow full screen mode.

Screen Calibration:

Age: *

Gender: Which gender do you identify with? *

Do you have any vision condition or disorder (e.g., myopia, presbyopia, etc.)? *

How often do you work with high dynamic range (HDR) images or tone mapping techniques? *

To what extent are you familiar with the field of computer graphics? *

Have you had training or education in photography? *

How would you describe your familiarity with photography? *

How frequently do you adjust visual properties such as brightness, exposure, or color in photos or videos? *

Have you had training or education in painting? *

Have you had training or education in illustration? *

What is your level of experience with visual arts such as painting, drawing, or digital illustration? *

Please describe the strategy you used to select the brighter lamp:

Which lightbulb emits more light?