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

P: yak, R: strainer, and O: chest. You press <<P>>.
P: dip, R: cow, and O: racket. You press <<O>>.
P: ticktacktoe, R: revolving door, and O: notebook. You press <<R>>.
P: water fountain, R: barrel, and O: polisher. You press <<R>>.
P: beetle, R: crystal ball, and O: spring roll. You press <<P>>.
P: scoreboard, R: suit, and O: wrap. You press <<O>>.
P: ginger, R: puffin, and O: ferret. You press <<P>>.
P: blower, R: payphone, and O: dynamite. You press <<O>>.
P: squirrel, R: airboat, and O: sewing kit. You press <<P>>.
P: rickshaw, R: brick, and O: pennant. You press <<O>>.
P: computer screen, R: cassette, and O: throne. You press <<O>>.
P: grain, R: brick, and O: wreath. You press <<R>>.
P: scalpel, R: bok choy, and O: calf. You press <<P>>.
P: sloth, R: bagel, and O: butter. You press <<P>>.
P: bassinet, R: soccer ball, and O: biscuit. You press <<O>>.
P: mantle, R: duckling, and O: origami. You press <<R>>.
P: soap, R: butter, and O: roll. You press <<P>>.
P: vegetable, R: waffle iron, and O: ram. You press <<O>>.
P: baseball bat, R: breadstick, and O: minivan. You press <<R>>.
P: muffin, R: saltshaker, and O: skunk. You press <<O>>.