The Inventory of Drinking Situations is a 100-item self-report instrument.

• A. 50-item
• B. 100-item
• C. 150-item
• D. 200-item

Answer: (B)

The main idea here is knowing the standard length of the Inventory of Drinking Situations. This self-report tool is designed to cover a wide range of contexts that can prompt drinking, so it includes enough items to capture different triggers and situations without being so long that it becomes impractical to complete. The classic form consists of 100 items, which provides a balance between thoroughness and feasible completion time in clinical or research settings. That breadth helps clinicians identify specific high‑risk situations for a given patient and tailor relapse-prevention strategies accordingly.

Options with fewer items would risk missing important contexts, while substantially longer versions would add burden without necessarily improving usefulness in typical practice. The 100-item length is the standard reference for this instrument, which is why it’s described as a 100-item self-report measure.