“内部一致性”常见的英文表达是 “internal consistency” 。
例如：
We need to assess the internal consistency of this questionnaire to ensure its reliability.（我们需要评估这份问卷的内部一致性，以确保其可靠性。）
The internal consistency of the measurement scale was satisfactory.（该测量量表的内部一致性令人满意。）