Bipolar Spectrum Diagnostic Scale (BSDS)

A screening tool for helping to identify bipolar spectrum disorder.

Part 1: The Story

Please read the following story. Check the box next to each sentence that you feel has been true for you for a significant period of your life. Leave blank any sentence that does not apply to you.

Part 2: Overall Fit

How well does the story above, taken as a whole, describe you?

Instructions for Use

Objective

The Bipolar Spectrum Diagnostic Scale (BSDS) is a self-report questionnaire that helps in the screening for bipolar disorder by identifying individuals who may benefit from a more thorough clinical evaluation.

How to Complete the Scale

The scale consists of two parts:

1. Part 1: The Story. Read a paragraph that describes a person whose moods and energy levels shift. As you read, check the box for each sentence that describes your own experience for a significant period of your life (e.g., several days or longer). It is okay to check many sentences or only a few.
2. Part 2: Overall Fit. After reading the entire story and checking the relevant sentences, answer the single question that follows: "How well does the story above, taken as a whole, describe you?". You must choose one of the five options provided.

Score Analysis

Score Calculation

The final BSDS score is calculated in two steps:

1. Story Score: The number of sentences you checked in Part 1.
2. Final Score: The "Story Score" is then multiplied by a number based on your answer in Part 2.
   • "Very well" multiplies your Story Score by 5.
   • "Fairly well" multiplies by 4.
   • "Somewhat" multiplies by 3.
   • "A little" multiplies by 2.
   • "Not at all" multiplies by 1.

The total score can range from 0 to 95 (19 sentences x 5).

Result Interpretation

The total score suggests the probability of having a bipolar spectrum disorder:

• 1-6: Bipolar disorder highly unlikely
• 7-12: Moderate probability
• 13-19: High probability
• 20+: Very high probability

Disclaimer: The BSDS is a screening instrument and not a diagnostic tool. A high score does not mean you have bipolar disorder, but it does suggest that a follow-up evaluation with a mental health professional is recommended.