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

R: shaving cream, X: snake, and Z: toad. You press <<R>>.
R: rhinoceros, X: butterfly, and Z: anvil. You press <<X>>.
R: torpedo, X: typewriter, and Z: plaster cast. You press <<X>>.
R: basketball, X: carrot, and Z: thorn. You press <<Z>>.
R: mat, X: stained glass, and Z: cord. You press <<Z>>.
R: filing cabinet, X: slot machine, and Z: chinaware. You press <<Z>>.
R: manhole, X: donkey, and Z: rosary. You press <<R>>.
R: cigarette holder, X: tie, and Z: graffiti. You press <<R>>.
R: scarf, X: spaghetti, and Z: sock. You press <<R>>.
R: mint, X: stapler, and Z: screwdriver. You press <<R>>.
R: coffee table, X: kangaroo, and Z: brussels sprouts. You press <<R>>.
R: grape, X: french horn, and Z: dragonfly. You press <<X>>.
R: leash, X: rain gauge, and Z: tuxedo. You press <<X>>.
R: filter, X: polygraph, and Z: turf. You press <<R>>.
R: hula hoop, X: fox, and Z: tree. You press <<R>>.
R: incense, X: siren, and Z: coin. You press <<X>>.
R: payphone, X: bee, and Z: cork. You press <<R>>.
R: dresser, X: grenade, and Z: thumb. You press <<R>>.
R: crystal, X: sprinkler, and Z: snake. You press <<R>>.
R: bun, X: cornbread, and Z: leash. You press <<Z>>.