Vector Pyschometric Group
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Our mission is to be scientific leaders in the assessment and modeling of health, behavioral, and educational outcomes.
Who we are
The Science Behind Assessment
Since 2007, VPG has delivered services and products focused on improving the assessment and statistical modeling of health, behavioral, and educational outcomes. We do this with two uniquely related but distinct business units: VPG Health and Scientific Software International. For more information, please explore the links below.
Our Business Units
VPG HEALTH
VPG Health is an empirically driven contract research organization dedicated to providing industry-leading research services. Our services focus on the development, modification, evaluation, administration (eCOA), and statistical modeling of clinical outcome assessments (COAs) for pharmaceutical companies, medical device companies, and government agencies.
SCIENTIFIC SOFTWARE INTERNATIONAL
Scientific Software International (SSI) offers the most advanced psychometric software on the market, including the flexMIRT® and IRTPRO™ packages for item and test analysis and psychometric scoring. We also offer advanced PC- and cloud-based statistical software packages for structural equation modeling, hierarchical linear modeling / mixed models, and longitudinal analyses.
