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Five tasks
Five tasks. One attempt at each — there are no retries, and what happens is kept.
Your score starts at 1000. What you do changes it.
The record stays on this device until you hand it in.
Nothing here is timed.
Spent
You have already had your attempt at this task.
The line on the mat is a Roman numeral equation, and it is false. You are only allowed to move one matchstick around on the mat to make the equation true.
Knoblich, Ohlsson, Haider & Rhenius (1999), Constraint relaxation and chunk decomposition in insight problem solving
Drag with the mouse. R turns a matchstick.
One matchstick may be moved.
Make every coin touch exactly three others.
Drag a coin.
Ormerod, MacGregor & Chronicle (2002), Dynamics and constraints in insight problem solving · run against Ohlsson's representational change theory by Öllinger, Jones & Knoblich (2012)
Place first.
W A S D to drive.
Pull a lever.
Foot (1967), The Problem of Abortion and the Doctrine of the Double Effect · the lever version is Thomson (1976)
The line is quiet.
Join all nine dots with four straight lines, without lifting the pen.
Click to start a line. Click again for each corner. Backspace takes one back.
Maier (1930), Reasoning in humans · the form most people know it in comes from Scheerer (1963)
Done
The record is on this device only. Hand it in and it exists somewhere else too. Watching it back reads the copy on this device.
That wipes this record from this device and gives every task back. Download it first if you want to keep it.