Krippendorff's Alpha is a statistical measure used to assess the reliability or agreement between multiple raters or observers. It evaluates how consistently different individuals classify or rate the same items, providing a score between 0 and 1. A score of 1 indicates perfect agreement, while a score of 0 suggests no agreement beyond chance. This measure is particularly useful in fields like social sciences, psychology, and content analysis, where subjective judgments are common. Unlike other reliability measures, Krippendorff's Alpha can handle different types of data, including nominal, ordinal, interval, and ratio scales, making it versatile for various research contexts.