INSTITUTE OF NUCLEAR MEDICINE
Alternate Forced Choice Platform
Blinded two-alternative forced-choice reader studies comparing imaging methods for image quality and lesion conspicuity.
Welcome
Thank you for taking part in this observer study. You will be shown pairs of images and asked to choose one image from each pair. Please view the study in a dimly lit room, on a full-screen browser window, and avoid interruptions while a task is running.
How it works
- Enter your nameUse the same name each time so you can stop and resume where you left off.
- Read the task instructionsEach task asks one question, e.g. which image has the higher quality or the more conspicuous lesion.
- Compare each pair and chooseTwo images are shown side by side. Pick one with a click or the arrow keys, then confirm. There is no "equal" option.
- Take your time, but trust first impressionsUse a full-screen window in a dimly lit room. Breaks are offered in longer tasks.