You will be presented with triplets of objects, which will be assigned to the keys R, X, and D.
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: railing, X: alligator, and D: ballot box. You press <<D>>.
R: pickle, X: chinchilla, and D: playpen. You press <<D>>.
R: mussel, X: garlic, and D: pepper. You press <<R>>.
R: bowling ball, X: chess piece, and D: barbed wire. You press <<D>>.
R: satellite dish, X: petri dish, and D: ravioli. You press <<D>>.
R: badge, X: noodle, and D: ginger. You press <<R>>.
R: snorkel, X: treadmill, and D: potato. You press <<D>>.
R: record player, X: saucer, and D: waterwheel. You press <<R>>.
R: log, X: footrest, and D: cake mix. You press <<R>>.
R: window, X: outlet, and D: bologna. You press <<D>>.
R: yogurt, X: can, and D: goblet. You press <<R>>.
R: tricycle, X: toothbrush, and D: marshmallow. You press <<D>>.
R: pineapple, X: walrus, and D: puck. You press <<R>>.
R: volleyball, X: hole, and D: insole. You press <<X>>.
R: crossbow, X: skunk, and D: zipper. You press <<X>>.
R: mulberry, X: mustache, and D: rake. You press <<R>>.
R: walrus, X: radiator, and D: tulip. You press <<X>>.
R: duffel bag, X: apple, and D: camper. You press <<X>>.
R: helicopter, X: hippopotamus, and D: hay. You press <<R>>.
R: walnut, X: chick, and D: curb. You press <<D>>.