Comprehension needs to be differentiated from skill-based components of reading and treated as the complex behavior it is. Comprehension is not a skill or set of skills; rather, it is a complex multidimensional ability. In fact, reading comprehension is one of the most complex activities that we engage in on a regular basis, and our ability to do so is dependent upon a wide range of knowledge and skills. These include relevant background knowledge and reasoning abilities. Also, like listening comprehension, it is dependent on well-developed language abilities, including not only vocabulary knowledge but also an understanding of grammar and text-level structures (e.g., pronoun referencing and story structure). In addition, it is influenced by the nature of the text being read (e.g., its topic, complexity, and cohesion) and the purpose of reading (e.g., to study for a test or evaluate an opinion piece). Finally, it is acquired not in a few short years, but over one’s lifetime.