You will be presented with triplets of objects, which will be assigned to the keys M, N, and I.
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.

M: mailbox, N: paint, and I: webcam. You press <<I>>.
M: sewage, N: water heater, and I: spear. You press <<I>>.
M: ivy, N: scallop, and I: paper towel. You press <<I>>.
M: speaker, N: swing, and I: stapler. You press <<I>>.
M: porthole, N: sandal, and I: swimming pool. You press <<N>>.
M: barrette, N: parking meter, and I: lollipop. You press <<M>>.
M: wig, N: chute, and I: flypaper. You press <<M>>.
M: petri dish, N: tortilla, and I: frame. You press <<I>>.
M: brick, N: water fountain, and I: loveseat. You press <<I>>.
M: board, N: ladder, and I: rabbit. You press <<I>>.
M: cannonball, N: painting, and I: gondola. You press <<M>>.
M: cordon bleu, N: chain, and I: siren. You press <<M>>.
M: flip flop, N: fruitcake, and I: turnstile. You press <<N>>.
M: splinter, N: scanner, and I: honeypot. You press <<M>>.
M: wheelbarrow, N: roller, and I: hammock. You press <<N>>.
M: tile, N: duct tape, and I: spacesuit. You press <<I>>.
M: tube top, N: printer, and I: bikini. You press <<N>>.
M: wind chimes, N: washcloth, and I: pizza. You press <<I>>.
M: pitcher, N: jigsaw puzzle, and I: hummus. You press <<N>>.
M: kite, N: crank, and I: root. You press <<N>>.