How can I use custom individual preferences coefficients in my analysis?

Custom individual Hierarchical Bayes (HB) coefficients can be uploaded in conjoint experiments. Here’s what you need to know:

Supported Experiment Types

Custom coefficients can be used in:

• Generic Conjoint (GC)
• Product Variant Selector (PVS) with HB
• Claims Test (CT) with HB
• Brand-Specific Conjoint (BSC)
• MaxDiff (MD)
• BPTO with the linear price setting

Note: This feature is not available for BPTO with cumulative price or experiments without HB.

How to Upload Custom Coefficients

1. Download the default coefficients
2. Prepare your CSV file:
   • Keep only the “Individual preferences” tab
   • Remove header rows
   • Remove “Notes” and “Weight” columns
   • Rename level columns to keep only level numbers (e.g., “B2: Kea Lager” → “B2”)
   • Ensure decimal points (not commas) are used for numbers
3. Make your desired changes
4. Go to Advanced settings → Analytics Options
5. Click Upload .csv file and follow the wizard

Important Considerations

• Values must be within the range [-1000, 1000]
• All participant IDs and coefficients must be present
• The system will validate your file before accepting it
• Only one set of custom coefficients can be active at a time
• Custom coefficients become invalid if:
  • The participant set changes
  • HB is disabled (for Claims or PVS)
  • The file becomes unreadable

Limitations

• Confidence intervals in the simulator become unavailable when using custom coefficients
• When duplicating an experiment without respondents, custom coefficients will not be copied

If you need assistance with custom coefficients, please contact Conjointly support for help.