Online version of the Bio-Time Quiz, developed by sleep specialist Michael Breus and presented in his book The Power of When.
The quiz identifies one of four chronotypes – Dolphin, Lion, Bear, or Wolf – based on sleep patterns, preferred timing of activity, and related behavioral tendencies. Each type represents a different pattern of daily alertness and energy, which Breus uses to suggest suitable times for sleep, work, exercise, and other activities.
This online version is provided for archival purposes. Please refer to the author's book.
This test is provided for educational and entertainment purposes only. It does not constitute psychological advice of any kind and comes with no guarantee of accuracy or validity. The assessment is free and anonymous.