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

O: acorn, F: bulletproof vest, and D: denture. You press <<O>>.
O: sombrero, F: jeep, and D: headband. You press <<F>>.
O: comb, F: clover, and D: motorcycle. You press <<F>>.
O: modem, F: mailbox, and D: cracker. You press <<D>>.
O: toilet, F: dolphin, and D: cutting board. You press <<D>>.
O: footrest, F: calamari, and D: gong. You press <<F>>.
O: parking meter, F: pecan, and D: mouthpiece. You press <<F>>.
O: sea urchin, F: credit card, and D: worm. You press <<F>>.
O: vial, F: coop, and D: lamb. You press <<O>>.
O: duck, F: stethoscope, and D: cloud. You press <<F>>.
O: flashlight, F: slide, and D: kebab. You press <<O>>.
O: payphone, F: cannonball, and D: measuring cup. You press <<O>>.
O: wheelchair, F: modem, and D: cranberry. You press <<O>>.
O: pen, F: chain, and D: rock. You press <<O>>.
O: webcam, F: guardrail, and D: jellyfish. You press <<F>>.
O: cordon bleu, F: kayak, and D: beaker. You press <<O>>.
O: brownie, F: potholder, and D: wrench. You press <<D>>.
O: cornmeal, F: roller coaster, and D: roof rack. You press <<O>>.
O: olive, F: swing set, and D: cash register. You press <<F>>.
O: popsicle, F: file, and D: quilt. You press <<O>>.