偏差値

1. Origins, structure, and basic meaning

• Structure: In 偏差値 (へんさち), deviation 偏差 and value 値 combine to denote a standardized score.
• Basic usage: 偏差値 is a Japanese standardized score expressing relative position within a group based on its distribution.

2. Common pitfalls and similar expressions

• Standardized versus raw score
  • It is not identical to the raw number of correct answers or to a percentage score.