Scale/Instrument Validation with Winsteps (Rasch Model)

Scale/Instrument Validation 

For researchers and institutions requiring defensible measurement quality.

Services include:

• Instrument reliability & validity testing
• Dimensionality assessment
• Item difficulty & fit statistics
• Differential Item Functioning (DIF)
  
• Winsteps-based Rasch Measurement Theory

Used for:

• • Survey instruments
  • Psychological scales
  • Educational assessments

Turnaround: 4–5 days