Vector Psychometric Group offers a full range of psychometric consulting services, from study design consulting to analysis plans to advanced quantitative analyses, such as factor analysis and item response theory, to provide evidence that a scale is providing reliable scores and valid inferences/uses suitable for informing high-stakes decisions.
VPG’s capabilities under the broad heading of psychometric consulting include:
- Evaluation of existing instruments
- literature reviews
- annotated bibliographies
- assessment of psychometric rigor in publications
- Scale Development and Item Writing
- Reviews of study protocols to ensure designs will provide desired psychometric information
- Item Response Theory analyses
- Factor analysis
- Linking scores
- Group comparison analyses
- Construct validity analyses
- Updating/ modifying existing scales
- Gap analysis for psychometric evidence
- Scientific writing for quantitative sections of program summary reports/dossiers
- Data collection and scoring
- Real-time IRT-based Scoring via the Adaptest® plugin
- Computerized Adaptive Testing via the Adaptest® plugin
- Learn more about Adaptest®