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

Z: lightning bug, F: beaker, and P: plate. You press <<Z>>.
Z: chopsticks, F: toad, and P: crumb. You press <<Z>>.
Z: nail file, F: fudge, and P: pearl. You press <<F>>.
Z: costume, F: creme brulee, and P: bear. You press <<P>>.
Z: shell, F: eggshell, and P: eyedropper. You press <<P>>.
Z: gutter, F: bird, and P: crayfish. You press <<Z>>.
Z: whistle, F: safety pin, and P: thermometer. You press <<Z>>.
Z: tuba, F: earring, and P: generator. You press <<P>>.
Z: oilcan, F: coverall, and P: soy sauce. You press <<F>>.
Z: map, F: rat, and P: cornbread. You press <<Z>>.
Z: stapler, F: cordon bleu, and P: bonnet. You press <<Z>>.
Z: meatball, F: shell, and P: cranberry. You press <<F>>.
Z: pantyhose, F: shaker, and P: pogo stick. You press <<F>>.
Z: bank, F: kneepad, and P: trampoline. You press <<Z>>.
Z: bench, F: gargoyle, and P: flipper. You press <<Z>>.
Z: brussels sprouts, F: guillotine, and P: boat. You press <<Z>>.
Z: garter, F: ankle, and P: beaver. You press <<P>>.
Z: helicopter, F: cashew, and P: peg. You press <<Z>>.
Z: tuba, F: webcam, and P: fencepost. You press <<F>>.
Z: crown, F: yacht, and P: catapult. You press <<F>>.