Validity and Research
With a wealth of assessment tools, industry knowledge and the research and validity to stand behind them, you can be certain you are getting what you deserve – the best in the personal assessment industry.
Validity Studies
We let our validity statements speak for themselves, with real numbers crunched by third-party statisticians.
DISC Validity Study
Values Validity Study
Research & Articles
TTI was founded on research-based principles and continues that philosophy to ensure our
assessment tools are the most reliable and valid assessments in the marketplace. Some research studies
include:
- Financial Industry Research – Bill Bonnstetter studies the personal skills apparent in top sales people in the financial products and services industry.
- German and US Sales Force Research – A comparison of the sales performance is made between US and Germany.
- If the Job Could Talk – In this article, Bill Bonnstetter describes the importance of the study that proves the effects of bias in the typical benchmarking process.



