An area of controversy in reading diagnosis and instruction is that of the nature of comprehension. Questions have been raised about varied thinking skills employed during the comprehension of text. Is comprehension a unitary process? Or, is comprehension composed of different abilities based on the complexity of thought processes required?
Joels, R. W., & Anderson, B. (1988). Informal Reading Inventory Comprehension Questions: Are Classification Schemes Valid?. Reading Horizons, 28 (3). Retrieved from http://scholarworks.wmich.edu/reading_horizons/vol28/iss3/4