Pattern Memory Game: Which Copy Is Exact?

About Pattern Shift

Pattern Shift is a visual memory game about positions. A square frame appears with a handful of colored dots scattered inside it, and a countdown bar tells you how long you have to take it in. Then the pattern disappears and a set of small frames replaces it. One of them is a perfect copy of what you saw. In every other frame something has changed, and your task is to find the copy that is untouched.

The changes come in three kinds. In some copies one or two dots have been nudged to a slightly different place. In others the entire pattern has been turned a few degrees around the center of the frame. In the third kind the whole pattern has slid a little to one side. Because the frame is always visible, even a small slide or turn can be detected if you noticed where the pattern sat relative to the edges. After you answer, a small symbol on each wrong copy tells you what had been done to it.

How to play

1. Study the pattern while the pink memorize bar runs. Note the colors and where they sit, but also where the whole group sits inside the frame.
2. When the copies appear, look at them as a set. Start with the one you think is closest to your memory, then check the positions of two or three dots to confirm.
3. Tap the copy you believe is identical. You have 11 seconds, and the round scores zero if time runs out.
4. The correct copy is highlighted in green. Arrows on the others show whether a dot moved, the pattern turned or the pattern slid.

A pattern of colored dots flashes briefly. Then you see several copies: pick the one that is exactly the same. In the others a dot has moved, or the whole pattern is turned or slid.

How scoring works

Each round is worth 100 points for the correct copy and 0 for anything else, so the game is won or lost on how small the differences are. Difficulty works through five levers at once. The number of dots grows from 4 to 7. The viewing time shrinks from 4 seconds to about 2.2 seconds. The size of a dot move or slide shrinks from about 15 frame units, where the frame is 100 units wide, to about 6. A turn shrinks from roughly 22 degrees to 9. And on levels 1 to 5 there are four copies to choose from, while on levels 6 to 10 there are six.

On the easiest levels two dots move in a wrong copy, which makes the difference easy to spot. From level 5 upward a single dot moves, which is the hardest kind of change to notice. With six copies, a blind guess is right about one time in six, so lucky streaks are short. The relaxed timer setting lengthens the viewing time by 40 percent and the answer time by 60 percent.

What it trains

This game trains visual working memory for spatial layout: holding the positions of several objects in mind and comparing them with a new picture. It also trains the habit of encoding a pattern as a whole, because noticing where the group sits relative to the frame is often easier than remembering each dot on its own.

The same skill helps when you notice that someone has moved things on your desk, check a seating plan against the room, remember where you parked relative to landmarks, or spot a changed layout in a screenshot. It is also the core of many board and card games where you need to remember the arrangement of pieces.

Tips for a higher score

• Group the dots into a shape. Three dots form a triangle, four a rough square, five a house. A shape is far easier to hold in mind than five separate coordinates.
• Note where the group sits relative to the frame, for instance a little left of center or leaning toward the top edge. That is exactly what slides and small turns change.
• Remember one dot as an anchor, such as the single blue one or the one nearest a corner, and remember its distance from the frame edge. Then verify the others against it.
• Use color as a guide. Dots of the same color sitting close together form a pair, and a pair whose gap has changed is a very visible clue.
• When the copies appear, rule out the obvious wrong ones first. Eliminating three or four candidates quickly leaves you more time for the real comparison.

The idea behind it

Working memory for visual layout is limited. Classic experiments on visual working memory, such as those by Luck and Vogel in 1997, found that people can hold roughly three to four simple objects at once, and that the limit applies to whole objects rather than to individual features. This is why grouping dots into one meaningful shape helps: it turns several items into one.

Memory for spatial position is also sensitive to the frame of reference. People remember where something was relative to boundaries and landmarks more precisely than where it was in empty space, a finding that goes back to work on categorical and metric coding of location. The visible frame in this game gives your memory an anchor, and the slides and turns test whether you used it.

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