You will be presented with triplets of objects, which will be assigned to the keys H, D, 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.

H: pine needle, D: plant, and I: elephant. You press <<I>>.
H: vase, D: helicopter, and I: sock. You press <<D>>.
H: maple syrup, D: football helmet, and I: toaster. You press <<D>>.
H: stirrup, D: pheasant, and I: tuning fork. You press <<D>>.
H: food processor, D: lock, and I: saxophone. You press <<D>>.
H: container, D: tape recorder, and I: column. You press <<D>>.
H: comic book, D: plastic film, and I: cake. You press <<H>>.
H: machete, D: meatball, and I: prism. You press <<D>>.
H: blindfold, D: bowler hat, and I: toothpick. You press <<I>>.
H: filing cabinet, D: napkin, and I: leaf. You press <<I>>.
H: caviar, D: mattress, and I: ottoman. You press <<I>>.
H: tree, D: fireworks, and I: dessert. You press <<I>>.
H: gramophone, D: ironing board, and I: cash register. You press <<D>>.
H: flashbulb, D: smoke alarm, and I: router. You press <<I>>.
H: ski pole, D: xylophone, and I: poppy. You press <<D>>.
H: button, D: gazelle, and I: dumbbell. You press <<D>>.
H: battery, D: gong, and I: snail. You press <<I>>.
H: boulder, D: chocolate, and I: coffin. You press <<H>>.
H: candy, D: bassinet, and I: dip. You press <<D>>.
H: thumbtack, D: mongoose, and I: buggy. You press <<H>>.