Doing Two Things at Once is NOT Better

I feel compelled to write this post because of blaring commercials claiming that doing two things at once is better. The healthymemory blog has many posts on the effects of multi-tasking (enter “multi-tasking” into the search block of the blog). Out attentional capacity is limited, such that when we try to do two tasks, the performance on one or both tasks usually suffers. Moreover, the switching between tasks involves attentional costs.

Now it might be true that we enjoy doing two things at once because we want to talk and watch television at the same time. And it is definitely true that there are times when we are required to do two things at once. Nevertheles, there are cognitive costs to doing two things at once. We can both perform and enjoy an activity more when we are devoting all our attention to it than when we multi-task. We might want to read or study at the same time we are watching television, but the efficiency of the reading or study will suffer.

We also need to realize that we can jeopardize ourselves and others when we multi-tasking. Texting and driving has received a lot of deserved adverse publicity. Unfortunately using a phone while driving has not received as much adverse publicity. There is also a misconception, that it is the hands that present a problem while driving and using the phone. Consequently there are hands-free laws on the books in many places. These laws accomplish little or nothing. It is the attentional demands of using a phone while driving that presents the danger. Research has indicated that driving performance while on the phone is equivalent to driving with a blood alcohol content of 0.08%, the most common standard for driving under the influence (DUI).

Another myth is that youngsters who have grown up with technology can multi-task without costs. Evolution is slow and insufficient time has passed for this to be the case. Moreover, research has found that this is not true. It was found that even students at the Massachusetts of Technology (MIT), who thought that they could multi-task without costs, were proven to be wrong.

The argument here is not to ever multi-task. Sometimes multi-tasking is convenient or enjoyable. There are other times when multi-tasking is required. But we must all be aware that multi-tasking does involve costs, and that we should never place ourselves or others in danger.

© Douglas Griffith and healthymemory.wordpress.com, 2012. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and healthymemory.wordpress.com with appropriate and specific direction to the original content.

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