Multitasking Can Reduce Productivity and Increase Stress: Why Focusing on One Task Matters

Trying to manage several activities at the same time may feel like an effective way to save time, but constantly dividing attention can make everyday work more difficult. From replying to messages while studying to checking emails during meetings, frequent interruptions can affect concentration, memory and the quality of work.

Psychologist Prerna Pant of ISIC Multispeciality Hospital in Delhi has highlighted the risks associated with excessive multitasking, particularly when people repeatedly move between digital distractions and tasks that require sustained attention. The habit, sometimes described as “toxic multitasking,” can create an impression of productivity while leaving people mentally exhausted and less satisfied with what they accomplish.

The concern is not that every combination of activities is harmful. Rather, problems arise when people attempt to handle several demanding tasks simultaneously or interrupt important work repeatedly to respond to notifications and other distractions.

Why multitasking can make work take longer

When people believe they are doing several things at once, their attention is often switching rapidly between activities. Each change requires the brain to refocus, recall where the previous task stopped and determine what needs to happen next.

These transitions can seem insignificant individually, but frequent switching may consume considerable time over the course of a day. Someone preparing for an examination, for example, may read a few paragraphs, check a phone notification and then return to the material. Even a brief interruption can make it harder to regain the same level of concentration.

The effect becomes more noticeable when both activities require thinking. Writing a report while following a detailed conversation, or solving a mathematical problem while responding to messages, places competing demands on attention.

As a result, completing multiple tasks in quick succession does not necessarily mean completing them efficiently. Work may take longer, important details can be missed and the final result may require additional corrections.

The effect on memory and mental well-being

Concentration plays an important role in learning and remembering information. When attention is repeatedly diverted, people may struggle to absorb new material or recall details later.

This can be particularly challenging for students, who need sustained attention to understand concepts rather than simply read through information. Frequently interrupting study sessions can make revision less effective and create the feeling that a topic must be learned repeatedly.

Excessive task-switching can also contribute to mental fatigue. Keeping track of unfinished activities, new notifications and changing priorities creates an additional cognitive burden. By the end of the day, someone may feel busy without having made meaningful progress on their most important responsibilities.

Stress can increase when several tasks remain incomplete or when interruptions make it difficult to meet deadlines. Over time, the combination of distraction, fatigue and reduced work quality may affect a person's sense of control over their schedule.

Digital distractions make the habit harder to break

Smartphones and social media make switching between activities particularly easy. A notification can interrupt reading, a message can divert attention from a work assignment, and a quick check of an application can turn into a longer distraction.

Because these interruptions are often brief, people may underestimate how frequently they occur. The cumulative effect, however, can leave little uninterrupted time for activities that require careful thought.

Not every form of multitasking has the same consequences. Combining a simple routine activity with another low-demand task may be manageable for some people. The greater concern is attempting to divide attention between activities that both require active concentration.

How single-tasking can improve productivity

A practical alternative is to focus on one priority at a time. This approach, often called single-tasking or monotasking, reduces unnecessary switching and makes it easier to track progress.

People can begin by identifying the most important task, setting aside a specific period to work on it and silencing non-essential notifications. Breaking larger assignments into smaller steps can make them easier to approach without feeling overwhelmed.

Short breaks also help provide a clear separation between periods of concentration. Rather than checking a phone whenever an alert appears, people can choose designated times to respond to messages and review other demands.

The goal is not to eliminate every interruption or follow an inflexible schedule. It is to protect enough uninterrupted attention for important work.

Ultimately, productivity depends less on how many activities a person appears to manage at once and more on how effectively those activities are completed. Giving demanding tasks focused attention can help people work more carefully, learn more effectively and finish the day with a clearer sense of progress.