About Farnsworth-Munsell Error Scoring
Purpose
The Farnsworth-Munsell test measures hue ordering skill. A participant arranges caps between reference ends. The final order is then scored. This calculator turns that order into local error values. It also adds a total error score.
Scoring Idea
Each cap is compared with its immediate neighbors. A perfect neighbor pair has a distance of one on each side. That gives a base value of two. Extra distance becomes the local error. Larger local errors show stronger placement mistakes.
Flexible Entry
The tool accepts a full circular cap set. It can also score a single tray. You may enter fixed end caps for tray scoring. Circular distance is useful when the first and last numbers meet on a hue circle. Linear distance is better for tray work with fixed anchors.
Interpreting Output
The total error score is the sum of scored local errors. The mean shows average error per cap. The maximum local error finds the worst single position. The standard deviation shows how uneven the errors are. Box or tray totals help locate a weak hue region.
Use the result as a numeric summary. Do not use it as a diagnosis alone. Lighting, screen entry mistakes, fatigue, age, and testing method can change scores. A trained examiner should review clinical findings.
Data Entry
Paste the cap order exactly as arranged. Use commas, spaces, or line breaks. Select the cap count. Choose circular or linear distance. Add anchors when your tray has fixed reference caps. Press calculate to see the summary above the form.
Review warnings before using the report. Duplicate caps usually mean a data entry issue. Missing caps can make the score incomplete. Out of range values should be corrected.
Reports
The CSV file is useful for spreadsheets. The PDF file is useful for quick records. The example table shows typical entries and outputs. You can replace those values with real test data.
Advanced options let you change the ideal neighbor step and severity bands. These bands are only a local guide. They make reports easier to scan. They should not replace official norms or examiner judgment.
The calculator also stores the entered settings in the submitted view. That helps you audit the method. It keeps scoring transparent for classrooms, clinics, labs, and quality teams during review later.