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Which slider moves more evenly?

About 15 minutes · no sign-up · anonymous

You'll see the same photo edited by two different systems, side by side, with one shared slider underneath. Dragging it moves both sides together, from the original photo at the far left to the full edit at the far right.

What you're judging

Only one thing: how evenly each side changes as you drag.

A good slider changes the picture at a steady rate. Every nudge of the slider should bring roughly the same amount of change as the last one, and the edit should always move forwards — never pause, never snap, never partly undo itself.

Two things spoil that. A dead zone is a stretch where you drag and almost nothing happens. A jump is the opposite: one small movement suddenly changes everything. They usually come together — a long flat stretch followed by the whole edit arriving at once.

For example

Two different photos, each with its own instruction. In the first row the fire builds a little at a time, so every step of the slider is worth about the same. In the second row the first four frames are almost identical — you could drag three quarters of the way and see nothing happen — and then the entire edit arrives in the final step. That second row is the kind of slider to vote against.

What not to judge

Ignore which final edit you like better, and ignore which picture is prettier. A side can reach a worse-looking result and still be the more even slider — that's the one to pick.

Practical

Under each side you'll see five snapshots taken evenly across the slider's range, which makes dead zones and jumps easy to spot. Pick a side and it moves straight on to the next pair. You have 15 minutes; it stops on its own when time is up, and you always get to finish the comparison you're on. Which system is on which side is randomised, and they're never named.

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Nothing identifying was collected — no name, no email, no account. Responses are stored under a random code generated in your browser.

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