📊 Advanced Likert Scale Analysis Tool

Professional statistical analysis for scale development and validation

📋 Quick Start Instructions

• Data Format: CSV with headers in first row (Q1, Q2, Q3...)
• Responses: Numeric values only (1-5, 1-7, etc.)
• Method: Extreme groups comparison using Welch's t-test
• Cutoff Options: 10%-50% groups (25% recommended for most studies)
• Decision: Items with p < α are retained for final scale

📥 Data Input

Paste your CSV data:

⚙️ Analysis Settings

High/Low Group %: 10% (Ultra Conservative) 15% 20% 25% (Recommended) 27% (Classical Edwards) 30% 33% (One-third) 40% 50% (Median Split)

Significance Level: α = 0.01 α = 0.05 α = 0.10

📊 Analysis Results