The National Council on Problem Gambling (NCPG) commissioned Ipsos in 2018 to conduct a comprehensive U.S. national consumer study on gambling prevalence rates. Here's a detailed breakdown of the research methodology:

Survey Implementation

• Online survey across all U.S. states (including Alaska and Hawaii)
• Conducted November 8-29, 2018
• Available in English and Spanish
• Device-responsive design (computer, smartphone, tablet)
• Used Ipsos and other market research panel sources

National Sample Characteristics

• 3,000 adults surveyed
• Representative of U.S. population distribution
• Controlled quotas for gender, age, and Hispanic/non-Hispanic proportions
• Post-fieldwork weighting for educational attainment
• Aligned with U.S. Census Bureau demographics

State-Level Analysis

• Additional state samples boosted to 500 adults per state
• Some states had smaller samples due to population size
• Enabled state-by-state data comparisons

Sports Betting Focus

• Identified through specific activity assessment questions
• Additional boost samples for state-level comparisons
• Measured sports betting incidence in general adult population

Statistical Reliability Credibility intervals:

• National sample (3,000): ±2.0%
• Sample of 1,000: ±3.5%
• Sample of 500: ±5.0%
• Sample of 200: ±7.9%

Note: Results may be subject to coverage and measurement errors.

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