Students make choices. That isn't allowed, however. Fuller puts a little more action into the activity. Then, for each pair of words, they have to move to one side of the room or the other. This makes it a little tougher for them because their actions are right out there and they can't hide.
Some teachers use it as a simple checklist.
Others give the assignment for homework and ask students to write the reasons for their choices. Some use the individual word pairs as prompts for journal writing. Others invite students to think up word pairs to add to the activity. All agree that it's a great opportunity to challenge students to think critically, make choices, and learn about themselves and others. The students always laugh when I tell them their options.