16Personalities.com

The Challenge

16Personalities (NERIS Analytics Limited) needed to scale from a niche personality quiz to the world's most-visited personality test platform — while maintaining psychometric rigor, validating the core assessment instrument, and producing actionable business and data insights across the product.

The Approach

Over 10 years I progressed from Researcher to Data Analysis Lead. I validated the main personality assessment, designed and validated numerous surveys using SPSS, AMOS, and custom R Shiny applications, conducted quantitative research on personality constructs, and ultimately led the data analysis and business analysis functions — turning raw response data into strategic product decisions.

Key Features

• Validated the core personality assessment instrument for psychometric reliability and validity
• Designed, deployed, and validated multiple research surveys across the platform
• Built custom R Shiny applications for internal data exploration and reporting
• Conducted quantitative research using Factor Analysis, IRT, and structural equation modeling
• Led business data analysis — translating user behavior into product strategy
• Multi-language psychometric validation across 30+ languages with culturally adapted norms

Results & Impact

• Grew to 200M+ personality tests taken worldwide
• Became the most-visited personality test site globally
• Maintained high psychometric reliability (Cronbach's alpha > 0.85) across scales
• Progressed from Researcher to leading the entire data analysis function
• Established data-driven decision-making culture across the product team

Key Metrics

Technology Stack