Overview

Stimulus materials are visual assets (images, graphics) that you show to participants alongside questions. Use them for:

Concept testing
Package design evaluation
Ad creative testing
Brand logo assessment
Product image reactions

Uploading Stimuli

Using the Stimulus Upload Card

Navigate to your question that needs visual materials
Click Add Stimulus or the image upload area
Select files from your computer
Files upload and preview automatically

File Limits

Limit	Value
Maximum files	10 per question
Maximum size	25 MB per file
Supported formats	JPEG, PNG, GIF, WebP

Auto-Compression

Large images are automatically compressed to:

Reduce upload time
Improve participant loading speed
Maintain visual quality

You'll see a progress indicator during compression.

Managing Stimuli

Custom IDs

Assign custom identifiers to each stimulus for easier reference in your analysis:

Click the stimulus thumbnail
Enter a custom ID (e.g., "Package_A", "Logo_Blue")
These IDs appear in your export data

Descriptions

Add descriptions to provide context:

Click the stimulus to open details
Add a description
Descriptions can be shown to participants or kept internal

Reordering

Drag stimuli to change their display order. The first stimulus appears most prominently.

Deleting

Click the X icon on any stimulus to remove it. This action cannot be undone.

Best Practices

Image Quality

Recommendation	Reason
High resolution	Clear viewing on all devices
Consistent sizing	Professional appearance
Neutral backgrounds	Focus on the subject
Multiple angles	If evaluating physical products

Naming Convention

Use clear, consistent naming:

Brand_Concept_A.png
Brand_Concept_B.png
Package_Front_v1.png
Package_Front_v2.png

This makes analysis and export clearer.

Quantity Guidelines

Use Case	Recommended Count
A/B comparison	2 images
Concept selection	3-5 images
Detailed evaluation	1-2 images per question

⚠️ Warning: Too many stimuli per question can overwhelm participants. Consider splitting across multiple questions.

Stimulus Display

Participant View

Participants see stimuli:

Above the question text
In a scrollable gallery if multiple
With zoom capability on click

Mobile Optimization

Stimuli are responsive:

Auto-resize for mobile screens
Swipe navigation for galleries
Pinch-to-zoom supported

Using Stimuli with Question Types

Best Combinations

Question Type	Stimulus Use
Multiple Choice	"Which concept do you prefer?"
Rating	"Rate this design on a scale of 1-10"
Matrix	"Rate each attribute for this product"
Open-Ended	"What are your initial thoughts on this?"
Ranking	"Rank these designs from favorite to least favorite"

Stimulus Materials