Study habit that looks innocent but is slowly draining brainpower

Students are often told that studying longer and harder will guarantee success but research shows that not all study habits are created equal. In fact, one seemingly harmless practice of multitasking while studying is quietly draining brainpower and sabotaging learning. Whether it is keeping a phone nearby, switching between tabs, or listening to distracting background media, multitasking feels productive but actually undermines memory, attention and problem-solving.

Multitasking is tempting because it creates the illusion of efficiency. Students believe they can “save time” by listening to music with lyrics, texting friends, or browsing social media while revising. However, neuroscience suggests that the human brain doesn’t truly multitask; it switches rapidly between tasks, wasting mental energy in the process.

A 2009 study in Proceedings of the National Academy of Sciences found that heavy media multitaskers performed worse on tests of working memory and sustained attention. The study established that heavy media multitaskers are more susceptible to interference from irrelevant environmental stimuli and from irrelevant representations in memory. This means that constantly juggling tasks makes it harder for the brain to filter out distractions and retain important information.

A 2012 study in Computers in Human Behavior, studied college students’ habits and discovered that those who frequently texted or used Facebook while studying scored significantly lower on academic performance. Time spent on social networking sites was negatively related to overall GPA. Even quick “study breaks” to check a notification were linked to reduced focus and poorer grades.

A 2009 study in Organizational Behavior and Human Decision Processes explained that task-switching leaves “attention residue.” In other words, when the brain shifts from one task to another (like from reading to texting), part of the attention stays stuck on the previous task, draining mental energy and slowing down new learning.

The innocent act of checking messages or switching tabs eats away at two things students need most:

1. ​Focused attention – without which learning cannot be deep or lasting.
2. Cognitive energy – which is finite and quickly depleted by switching costs.
   Over time, multitasking does not just reduce productivity in the moment; it trains the brain into shallow and distracted thinking, making it harder to engage in deep study sessions.
   

Instead of multitasking, students can adopt smarter and brain-friendly habits like -

• ​Pomodoro technique: Study in 25–30 minute focused intervals with short breaks.
• Single-tasking: Keep only the materials you need open; turn off notifications.
• Mindful breaks: Step outside, stretch, or hydrate instead of scrolling social media.
  

What looks like an innocent study habit of multitasking is actually draining brainpower in subtle but powerful ways. Backed by research in psychology and education, the evidence is clear that the more we divide our attention, the less we truly learn. By reclaiming focus and resisting the lure of constant switching, students can not only protect their brainpower but also study smarter, not harder.