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

Z: washcloth, W: wasp, and X: cd player. You press <<W>>.
Z: pendulum, W: torch, and X: humvee. You press <<X>>.
Z: wheat, W: zucchini, and X: xylophone. You press <<X>>.
Z: machine gun, W: soap, and X: stick. You press <<Z>>.
Z: orange rind, W: plunger, and X: tupperware. You press <<Z>>.
Z: train set, W: bat, and X: ping-pong table. You press <<W>>.
Z: rope, W: bag, and X: macadamia. You press <<X>>.
Z: mouthpiece, W: shutter, and X: button. You press <<Z>>.
Z: remote control, W: horse, and X: cigarette butt. You press <<W>>.
Z: leggings, W: koala, and X: sauce. You press <<W>>.
Z: hula hoop, W: elbow, and X: rim. You press <<X>>.
Z: bus, W: shower, and X: briefcase. You press <<X>>.
Z: pincushion, W: bouquet, and X: pretzel. You press <<Z>>.
Z: cheeseburger, W: home plate, and X: pita. You press <<W>>.
Z: headlamp, W: rug, and X: speedboat. You press <<W>>.
Z: urinal, W: donkey, and X: whisk. You press <<W>>.
Z: tortellini, W: muff, and X: sardine. You press <<W>>.
Z: telescope, W: lip gloss, and X: desk. You press <<W>>.
Z: pendulum, W: torch, and X: humvee. You press <<X>>.
Z: rice, W: mulberry, and X: coop. You press <<X>>.