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

H: mattress, X: wax, and D: stick. You press <<H>>.
H: sprinkler, X: sock, and D: gauge. You press <<H>>.
H: teddy bear, X: onion, and D: breakfast. You press <<H>>.
H: fencepost, X: rack, and D: buckle. You press <<D>>.
H: kitten, X: windshield wiper, and D: tadpole. You press <<X>>.
H: humvee, X: patch, and D: eggbeater. You press <<D>>.
H: book, X: chair, and D: pom-pom. You press <<D>>.
H: fountain pen, X: necklace, and D: gravel. You press <<D>>.
H: drain, X: clay, and D: cardigan. You press <<H>>.
H: cup, X: cushion, and D: table. You press <<D>>.
H: cellphone, X: lizard, and D: ticktacktoe. You press <<X>>.
H: cotton candy, X: harp, and D: oar. You press <<H>>.
H: pigeon, X: horn, and D: badger. You press <<X>>.
H: straightjacket, X: cornhusk, and D: teabag. You press <<H>>.
H: sewing kit, X: puppy, and D: gift. You press <<H>>.
H: chariot, X: triangle, and D: coffin. You press <<D>>.
H: jigsaw puzzle, X: pajamas, and D: skateboard. You press <<D>>.
H: christmas tree, X: headset, and D: aircraft carrier. You press <<D>>.
H: crystal, X: cd player, and D: horse. You press <<H>>.
H: target, X: avocado, and D: beehive. You press <<X>>.