DOWNLOAD THE COMPLETE TECHNICAL QUALITY DOCUMENT (900K PDF)
		Download this topic only (290K PDF)
	Superior Psychometric and Technical Quality The technical superiority of TerraNova, The Second Edition offers you significant advantages in today's challenging assessment environment.
		Advanced Item Response Theory (IRT) methods deliver the most reliable and accurate results possible, providing a high level of confidence, accountability, and defensibility.
		CTB's unique, widely acclaimed Bookmark standard-setting procedure was used to develop empirically based Performance Levels that align with the achievement levels of the National Assessment of Educational Progress (NAEP).
		Selected-response and constructed-response items are evaluated on the same score scale. TerraNova, The Second Edition scores provide accurate measures of student proficiency while minimizing interpretation errors in mixed-format tests.
		TerraNova, The Second Edition--the sixth edition of the California Achievement Tests® (CATTM)--is an alternate form of the TerraNova Comprehensive Tests of Basic Skills (CTBS). Results from our new assessment are comparable with those of TerraNova CTBS and can be integrated into longitudinal studies with a high degree of confidence.
		CTB's secure, advanced scoring processes ensure the highest degree of reliability, accuracy, and timeliness for delivery of TerraNova assessment results.