The term multi-tasking probably originated from computer terminology wherein two simultaneous tasks are carried on by the computer by distribution of tasks to various processors. A “super”computer was defined as on which had many processors and a lot of memory that could process computations in parallel. The human brain is obviously capable of some elementary multi-tasking since it can process your muscle movement, eye movement and other motor areas while processing what is seen through the eye. However, it is also known that brain has defined centers for language, vision and other areas.
In early 2000, work done by David Meyer, a psychologist at University of Michigan published papers went viral essentially stating that human brain was incapable of multi-tasking cognition and instead functioned as a fast switcher when moving from task to task. He has been working for several decades in this area working on brain’s speed, accuracy and memory. Dr. Meyer’s hypothesis is that when a person performs multiple tasks, it is possible that many of the tasks require the same channels for processing and hence happen through rapid switching. Take the example of talking on the phone and writing an email. Yes, in one of them you are using your ear and mouth, and in the other case you are using your fingers to type. However, since there is a single neural channel through which language works, it requires rapid switching, which means that one of the tasks is going to get very inefficient.
Obviously, Meyer’s research got significant attention for cell phone use during driving. Using the same language center while talking and reading signs on the road means fast switching required but more likely means one of the signs are ignored. He recommends that creative time be marked but more importantly, not to ignore that only so many centers in the brain.
In conclusion, we should pay attention to only one thing at a time to be effective as we move forward incorporating technology into our lives.