You will be presented with triplets of objects, which will be assigned to the keys D, S, and O.
In each trial, please indicate which object you think is the odd one out by pressing the corresponding key.
In other words, please choose the object that is the least similar to the other two.

D: button, S: clipboard, and O: coop. You press <<O>>.
D: trombone, S: shower curtain, and O: grapevine. You press <<O>>.
D: chalkboard, S: neck, and O: nut. You press <<D>>.
D: coaster, S: shelf, and O: beanie. You press <<O>>.
D: cash machine, S: hatchet, and O: octopus. You press <<O>>.
D: centerpiece, S: turbine, and O: videogame. You press <<D>>.
D: bat, S: chest, and O: football helmet. You press <<S>>.
D: axe, S: flatiron, and O: penguin. You press <<O>>.
D: pom-pom, S: beachball, and O: doorknob. You press <<O>>.
D: aircraft carrier, S: dishrag, and O: curling iron. You press <<D>>.
D: fork, S: lamb, and O: sandbox. You press <<O>>.
D: doll, S: carriage, and O: ski lift. You press <<D>>.
D: screen, S: bamboo, and O: ratchet. You press <<S>>.
D: rickshaw, S: paint, and O: coconut. You press <<S>>.
D: hobbyhorse, S: elephant, and O: faucet. You press <<O>>.
D: sweet potato, S: bone, and O: doorknocker. You press <<O>>.
D: chandelier, S: checkbook, and O: bow. You press <<D>>.
D: walrus, S: jackhammer, and O: pasta. You press <<O>>.
D: torpedo, S: alpaca, and O: belt buckle. You press <<D>>.
D: bolt, S: tool, and O: organ. You press <<O>>.