Research
Since the 1990s, experimental psychologists have started experiments on the nature and limits of human multitasking. It has been shown multitasking is not as workable as concentrated times. In general, these studies have disclosed that people show severe interference when even very simple tasks are performed at the same time, if both tasks require selecting and producing action (e.g., (Gladstones, Regan & Lee 1989) (Pashler 1994)). Many researchers believe that action planning represents a "bottleneck", which the human brain can only perform one task at a time. Psychiatrist Edward M. Hallowell has gone so far as to describe multitasking as a “mythical activity in which people believe they can perform two or more tasks simultaneously as effectively as one.”
Others have researched multitasking in specific domains, such as learning. Mayer and Moreno have studied the phenomenon of cognitive load in multimedia learning extensively and have concluded that it is difficult, and possibly impossible to learn new information while engaging in multitasking. Junco and Cotten examined how multitasking affects academic success and found that students who engaged in more multitasking reported more problems with their academic work. A more recent study on the effects of multitasking on academic performance found that using Facebook and text messaging while studying were negatively related to student grades, while online searching and emailing were not.
Read more about this topic: Human Multitasking
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