Which statement is incorrect? Group of answer choices Daily, ongoing observation of reading and writing behaviors is an important part of assessment. Research has shown that using several measures of achievement (both formal and informal) provides the best estimate of actual reading level. Determining the level at which a delayed reader is reading is unimportant; the important issues are which skills are deficient and which strengths can be capitalized on to build those skills. There are many commercially-prepared IRIs that can be used with delayed readers