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

D: stem, X: clam, and O: scallop. You press <<O>>.
D: hockey stick, X: earring, and O: racket. You press <<X>>.
D: microwave, X: crayfish, and O: strap. You press <<X>>.
D: gorilla, X: duct tape, and O: scalpel. You press <<X>>.
D: tank, X: necklace, and O: hippopotamus. You press <<O>>.
D: pocket, X: blanket, and O: dish. You press <<D>>.
D: underwear, X: apple tree, and O: taco. You press <<D>>.
D: chopsticks, X: eraser, and O: bow. You press <<X>>.
D: chopsticks, X: spring roll, and O: ticktacktoe. You press <<O>>.
D: pliers, X: earplug, and O: napkin. You press <<D>>.
D: calamari, X: insole, and O: comic book. You press <<O>>.
D: glasses, X: oar, and O: leopard. You press <<D>>.
D: marshmallow, X: silicone, and O: mousetrap. You press <<X>>.
D: pepperoni, X: raccoon, and O: air pump. You press <<O>>.
D: wheelbarrow, X: spaghetti, and O: steak. You press <<D>>.
D: stapler, X: marker, and O: place mat. You press <<X>>.
D: macadamia, X: chess piece, and O: go-kart. You press <<D>>.
D: keyhole, X: mouthpiece, and O: crystal ball. You press <<O>>.
D: hearing aid, X: drill, and O: turbine. You press <<D>>.
D: icepick, X: treasure, and O: pulpit. You press <<D>>.