Here are just some of the psychometric consulting services offered by Vector Psychometric Group, LLC. If we can assist you in any way or you simply have a question about our psychometric consulting services, please email us Info@VPGCentral.com.
Scale Development and Evaluation
Whether you are updating an existing scale, trying to link scores from two different scales, evaluating one or more scales for their ability to fulfill a particular measurement need, or developing an entirely new scale VPG has the psychometric expertise to help you successfully accomplish your goals. We have extensive training and experience with both classical test theory methods and more recent latent variable-based psychometric models including factor analysis (both exploratory and confirmatory) and item response theory (IRT).
Psychometric Quality Control
If you need a fresh set of eyes to look over results or to replicate findings, consider letting VPG help with your psychometric quality control. Given our wide range of expertise, we are able to provide our clients with second opinions, evaluations of work performed by contractors/vendors, and even forensic work to identify where problems occurred.
General Statistical Consulting
Although our primary expertise is in psychometrics, the staff at VPG have a wide experience with a number of statistical techniques including: linear and nonlinear random effects modeling (also called mixed modeling and hierarchical linear modeling), structural equation modeling, mixture models, latent and growth models.
Custom Psychometric Software Development
Whether you’re using our existing software and need a feature not currently offered, or need software that doesn’t yet exist, VPG is your solution for customized psychometric software. We are happy to work with clients to tailor existing offerings to meet their needs or, when that isn’t possible, to create new software from scratch.