You will be presented with triplets of objects, which will be assigned to the keys O, H, and X.
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: wax paper, H: steamroller, and X: mousepad. You press <<H>>.
O: fast food, H: crutch, and X: lobster. You press <<H>>.
O: grapefruit, H: charger, and X: footprint. You press <<X>>.
O: eraser, H: frame, and X: wrench. You press <<H>>.
O: rattlesnake, H: buggy, and X: ketchup. You press <<X>>.
O: wick, H: cilantro, and X: coleslaw. You press <<O>>.
O: skewer, H: staple gun, and X: poster. You press <<H>>.
O: cannonball, H: racehorse, and X: kite. You press <<H>>.
O: koala, H: asparagus, and X: footrest. You press <<X>>.
O: straightjacket, H: firecracker, and X: mattress. You press <<X>>.
O: slide, H: dishrag, and X: tomato sauce. You press <<O>>.
O: denture, H: backgammon, and X: sandbox. You press <<O>>.
O: handkerchief, H: trap, and X: snake. You press <<O>>.
O: pizza, H: pinwheel, and X: pine tree. You press <<O>>.
O: mouthpiece, H: crayon, and X: pants. You press <<X>>.
O: fork, H: compost, and X: bumper. You press <<O>>.
O: balloon, H: aardvark, and X: car. You press <<O>>.
O: deer, H: donut, and X: license plate. You press <<X>>.
O: orchid, H: stem, and X: sea urchin. You press <<H>>.
O: saw, H: owl, and X: paperclip. You press <<H>>.