In our technology-driven lives, we are unaccustomed to sitting at a desk for prolonged periods of time consuming content – unless the material is compelling. Even with a strong desire to learn, information presented statically will cause our brains to shut down after 10-20 minutes.
Not all learning is equal. A two-hour audio presentation does not guarantee understanding. Similarly, attendance at the entire presentation does not indicate mastery. No real learning takes place until it moves from surface knowledge to dynamic knowledge, not only to know about the information, but to be able to apply the skill or concept to real-life scenarios.