Why You Can’t Focus: The Neuroscience of “Attention Residue” Why is it so hard to concentrate for more than 15 minutes? Science suggests it’s not just your phone—it’s how you switch tasks. We explore the concept of "Attention Residue" and how rapid context-switching physically fragments your brain's ability to think deeply. In this video: – What "Attention Residue" is and why it lowers your IQ – The myth of multitasking: what actually happens in the brain – Why "quick checks" of email destroy deep work for 20+ minutes – How to retrain your focus span using progressive overload