Which type of test typically includes several subtests?

Achievement batteries are a type of test that is designed to measure a range of skills and knowledge across various subjects. These tests typically include multiple subtests that assess different areas, such as mathematics, reading comprehension, and writing, allowing educators to gain a comprehensive understanding of a student's abilities and where they might need further development. The inclusion of these subtests provides a more nuanced view of a student's performance, rather than a singular focus on one subject or skill.

In contrast, diagnostic tests are primarily aimed at identifying specific learning difficulties or areas for remediation rather than covering a wide range of skills. Subject area achievement tests focus on mastery of specific content knowledge within a particular subject, while skills tests are often narrower in scope, assessing proficiency in specific tasks without the breadth of multiple subtests.