You will be presented with triplets of objects, which will be assigned to the keys Z, W, and R.
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: stingray, W: flag, and R: pea. You press <<W>>.
Z: roadsweeper, W: goose, and R: stockings. You press <<W>>.
Z: abacus, W: yogurt, and R: headphones. You press <<W>>.
Z: sea urchin, W: wing, and R: candy. You press <<W>>.
Z: baseball bat, W: speedometer, and R: tricycle. You press <<W>>.
Z: stomach, W: splinter, and R: bone. You press <<R>>.
Z: gold, W: scalpel, and R: bologna. You press <<Z>>.
Z: thimble, W: vest, and R: shell. You press <<Z>>.
Z: sausage, W: grille, and R: spider web. You press <<W>>.
Z: raft, W: centerpiece, and R: toothbrush. You press <<W>>.
Z: bedpan, W: metal detector, and R: goldfish. You press <<W>>.
Z: french fries, W: hot chocolate, and R: paint. You press <<R>>.
Z: arrow, W: diskette, and R: wheat. You press <<W>>.
Z: strawberry, W: seesaw, and R: comic book. You press <<Z>>.
Z: chessboard, W: mustard, and R: walker. You press <<W>>.
Z: sand, W: dynamite, and R: pajamas. You press <<W>>.
Z: velcro, W: compass, and R: glove. You press <<Z>>.
Z: thread, W: tostada, and R: hedgehog. You press <<R>>.
Z: satellite dish, W: record player, and R: pickle. You press <<R>>.
Z: pigeon, W: crucifix, and R: cleat. You press <<Z>>.