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

O: abacus, Z: chalice, and R: swimsuit. You press <<R>>.
O: dog, Z: birthday cake, and R: squirrel. You press <<Z>>.
O: doormat, Z: revolver, and R: waterwheel. You press <<Z>>.
O: roller, Z: tractor, and R: glasses. You press <<R>>.
O: thermos, Z: mascara, and R: anchor. You press <<R>>.
O: ink, Z: wick, and R: tuning fork. You press <<R>>.
O: boxer shorts, Z: nail, and R: thermostat. You press <<Z>>.
O: brooch, Z: croissant, and R: tackle. You press <<Z>>.
O: espresso, Z: chinchilla, and R: moss. You press <<O>>.
O: tumbleweed, Z: sofa bed, and R: footprint. You press <<Z>>.
O: stamp, Z: bathtub, and R: glasses. You press <<Z>>.
O: rhubarb, Z: coffin, and R: wheelchair. You press <<O>>.
O: chips, Z: icemaker, and R: plum. You press <<Z>>.
O: tape, Z: weather vane, and R: lollipop. You press <<Z>>.
O: volleyball, Z: ski, and R: earring. You press <<R>>.
O: perfume, Z: face, and R: champagne. You press <<Z>>.
O: raincoat, Z: place mat, and R: flower. You press <<O>>.
O: thimble, Z: target, and R: cane. You press <<O>>.
O: megaphone, Z: screen, and R: xylophone. You press <<Z>>.
O: burrito, Z: column, and R: candle. You press <<Z>>.