"A Non-Theist simply does not concern him or herself with religion," Silver and Coleman wrote. "Religion plays no role or issue in one's consciousness or worldview; nor does a Non- Theist have concern for the atheist or agnostic movement."
They continue: "They simply do not believe, and in the same right, their absence of faith means the absence of anything religion in any form from their mental space."
6) Ritual atheist
They don't believe in God, they don't associate with religion, and they tend to believe there is no afterlife, but the sixth type of nonbeliever still finds useful the teachings of some religious traditions.
"They see these as more or less philosophical teachings of how to live life and achieve happiness than a path to transcendental liberation," Silver and Coleman wrote. "For example, these individuals may participate in specific rituals, ceremonies, musical opportunities, meditation, yoga classes, or holiday traditions."
For many of these nonbelievers, their adherence to ritual may stem from family traditions. For others, its a personal connection to, or respect for, the "profound symbolism" inherent within religious rituals, beliefs and ceremonies, according the researchers.