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

W: chaps, D: cash register, and R: parking meter. You press <<W>>.
W: rollerskate, D: scarf, and R: popcorn. You press <<R>>.
W: crayon, D: wreath, and R: hopscotch. You press <<D>>.
W: sprinkler, D: waffle, and R: motherboard. You press <<D>>.
W: copier, D: slot machine, and R: raft. You press <<R>>.
W: branch, D: brooch, and R: nail clippers. You press <<W>>.
W: mop, D: ferret, and R: spark plug. You press <<D>>.
W: place mat, D: alligator, and R: riser. You press <<D>>.
W: blowfish, D: stem, and R: baseball glove. You press <<R>>.
W: funnel, D: abacus, and R: firecracker. You press <<D>>.
W: mullet, D: shoehorn, and R: hippopotamus. You press <<D>>.
W: lobster, D: mullet, and R: landmine. You press <<R>>.
W: sea urchin, D: bookshelf, and R: yolk. You press <<D>>.
W: cable, D: rickshaw, and R: deer. You press <<R>>.
W: shoulder, D: sandbag, and R: clothesline. You press <<W>>.
W: sifter, D: headphones, and R: garbage. You press <<R>>.
W: trunk, D: altar, and R: vial. You press <<R>>.
W: slingshot, D: chin, and R: seal. You press <<R>>.
W: briefcase, D: soy sauce, and R: bubble wrap. You press <<W>>.
W: chest, D: keg, and R: quill. You press <<D>>.