You will be presented with triplets of objects, which will be assigned to the keys O, E, and Z.
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.

O: mold, E: ski pole, and Z: scuba. You press <<O>>.
O: sandbox, E: tooth, and Z: landmine. You press <<E>>.
O: snack, E: doorknob, and Z: envelope. You press <<E>>.
O: tadpole, E: glove, and Z: granite. You press <<Z>>.
O: punching bag, E: panties, and Z: grass. You press <<E>>.
O: root, E: ice-cream cone, and Z: toothbrush. You press <<O>>.
O: chain, E: grenade, and Z: dishwasher. You press <<Z>>.
O: ice cube, E: crystal, and Z: sweeper. You press <<Z>>.
O: bullet, E: pastry, and Z: pita. You press <<O>>.
O: skunk, E: moccasin, and Z: pump. You press <<O>>.
O: generator, E: icicle, and Z: rubber band. You press <<O>>.
O: mouse, E: eggnog, and Z: sunroof. You press <<E>>.
O: backpack, E: bomb, and Z: pepper mill. You press <<O>>.
O: fork, E: joystick, and Z: router. You press <<O>>.
O: riser, E: telescope, and Z: weasel. You press <<Z>>.
O: blanket, E: snowman, and Z: scanner. You press <<O>>.
O: cougar, E: boar, and Z: trophy. You press <<Z>>.
O: snow, E: donkey, and Z: mole. You press <<O>>.
O: domino, E: iceskate, and Z: pita. You press <<Z>>.
O: dustpan, E: cat, and Z: curry. You press <<O>>.