You will be presented with triplets of objects, which will be assigned to the keys Z, E, and A.
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: periscope, E: ladybug, and A: stiletto. You press <<A>>.
Z: macadamia, E: ice-cream cone, and A: paint. You press <<A>>.
Z: cash register, E: cross, and A: gargoyle. You press <<Z>>.
Z: gourd, E: computer screen, and A: chisel. You press <<Z>>.
Z: ashtray, E: screw, and A: pea. You press <<Z>>.
Z: highlighter, E: mullet, and A: slug. You press <<Z>>.
Z: oatmeal, E: seesaw, and A: chili. You press <<E>>.
Z: grater, E: grits, and A: chisel. You press <<A>>.
Z: cable, E: gong, and A: buoy. You press <<E>>.
Z: fencepost, E: tomato sauce, and A: whisk. You press <<Z>>.
Z: cd player, E: bull, and A: waffle iron. You press <<Z>>.
Z: bonsai, E: basketball hoop, and A: desk. You press <<A>>.
Z: yarn, E: chess piece, and A: sunglasses. You press <<E>>.
Z: goose, E: blackberry, and A: mongoose. You press <<E>>.
Z: window, E: dip, and A: bowl. You press <<Z>>.
Z: swan, E: shuffleboard, and A: hip. You press <<Z>>.
Z: dynamite, E: plug, and A: spider web. You press <<A>>.
Z: water cooler, E: jewel, and A: cocktail. You press <<E>>.
Z: candy bar, E: shoe, and A: tablecloth. You press <<E>>.
Z: saxophone, E: rattlesnake, and A: forklift. You press <<E>>.