News

Vector Psychometric Group, LLC (VPG) is pleased to announce the re-branded and updated websites for Scientific Software International (SSI), a wholly owned subsidiary.  The refreshed SSI Live™ website will be the single store front for VPG and SSI’s industry-leading statistical and psychometric s...

Vector Psychometric Group, LLC is pleased to announce the immediate availability of a public beta version of the brand new, entirely cloud-based software HLMix™ on SSI Live™. HLMix™ is a cloud-based program for analyzing 2- or 3-level hierarchically structured data with a wide range of outcome variable distributions and link functions. The program features a point-and-click interface compatible with any common web browser. Output is provided in both HTML and text format. In addition to standard output expected from multilevel…

Vector Psychometric Group and Scientific Software International have created a YouTube Channel that includes educational videos on Item Response Theory Modeling, Introductory Multilevel Modeling and Advanced Multilevel Modeling.