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

I: scooter, X: crossbow, and P: ski boots. You press <<X>>.
I: typewriter, X: cleat, and P: octopus. You press <<P>>.
I: tree, X: thermos, and P: aquarium. You press <<X>>.
I: viewfinder, X: tuning fork, and P: hat. You press <<X>>.
I: grass, X: chipmunk, and P: banana split. You press <<P>>.
I: button, X: mashed potato, and P: spam. You press <<I>>.
I: payphone, X: panther, and P: defibrillator. You press <<X>>.
I: snack, X: baseball, and P: bowling ball. You press <<I>>.
I: bazooka, X: potpourri, and P: curb. You press <<X>>.
I: pineapple, X: bulldozer, and P: milkshake. You press <<X>>.
I: headband, X: barbed wire, and P: drawer. You press <<I>>.
I: net, X: antelope, and P: birdhouse. You press <<I>>.
I: bell pepper, X: sweet potato, and P: ruby. You press <<P>>.
I: polo shirt, X: turtleneck, and P: smoothie. You press <<P>>.
I: slide, X: seal, and P: porthole. You press <<I>>.
I: pea, X: loincloth, and P: mantle. You press <<X>>.
I: pincushion, X: retainer, and P: golf cart. You press <<P>>.
I: chive, X: skeleton, and P: shuffleboard. You press <<X>>.
I: insole, X: bassoon, and P: frame. You press <<I>>.
I: marble, X: gate, and P: tupperware. You press <<P>>.