A simple test of 32 questions called the HCL-32 test has been developed to help distinguish major depression from bipolar disorder. The study documenting this is published in the Journal of Affective Disorders.
According to the study, this test was able to identify more than 80 percent of patients with bipolar disorder. Although this test was not designed to distinguish between types I and II, this diagnosis should be easier to make given patient data and history.
I have heard that an on-line test will be developed soon. In the meantime, here are the main questions used in the HCL-32:
Please try to remember a period when you were in a "high" state (while not using drugs or alcohol). In such a state:
- I need less sleep
- I feel more energetic and more active
- I am more self-confident
- I enjoy my work more
- I am more sociable (make more phone calls, go out more)
- I want to travel and/or do travel more
- I tend to drive faster or take more risks when driving
- I spend more money/too much money
- I take more risks in my daily life (in my work and/or other activities)
- I am physically more active (sport etc.)
- I plan more activities or projects.
- I have more ideas, I am more creative
- I am less shy or inhibited
- I wear more colorful and more extravagant clothes/make-up
- I want to meet or actually do meet more people
- I am more interested in sex, and/or have increased sexual desire
- I am more flirtatious and/or am more sexually active
- I talk more
- I think faster
- I make more jokes or puns when I am talking
- I am more easily distracted
- I engage in lots of new things
- My thoughts jump from topic to topic
- I do things more quickly and/or more easily
- I am more impatient and/or get irritable more easily
- I can be exhausting or irritating for others
- I get into more quarrels
- My mood is higher, more optimistic
- I drink more coffee
- I smoke more cigarettes
- I drink more alcohol
- I take more drugs (sedatives, anti-anxiety pills, stimulants)
By the way, I took this test - does anyone else score 100%?


Being put on Prozac for depression is what caused me to become manic. I didn't figure this out for at least 7 years or so.