Dear GMAT club lectors, I also tried this topic. I appreciate your feedback !

The author of the article argues that being a couch potato watching TV is more harmful to the brain activity than spending time on a computer. He argues that the “one-way” medium television especially reduces the activity in the brain regions for interaction and engagement. In order to avoid adverse effects on one’s cognitive abilities, the author suggests to work on a computer instead as this allows, between others, to have more brain activity. As good as this explanation sounds, the argument is flawed and is not well present for the following reasons:
Fristly, the author of the paragraph totally neglects to present any valid medical study to underpin the main argumentation of the claim he was presenting. Without proving that any television content leads to decreased brain activity and therefore to negative effects for the person mental situation, the argument cannot make a statement. For example, if a person watches a quiz show and also personally gets engaged in the questions present, he/she would definitely use higher brain regions by thinking about questions. In addition, the learning part of the brain would also be activated as new information will be processed. The statement does not take this into account and leaves out positives effects of television consume.
On the other hand, the writer of the argument wrongly assumes that any activity conducted on a computer leads to increased brain activity and thus to increased energy and mental sharpness. Let’s assume the respective person just switches from the television to the computer to watch videos on any online video portal. Although he needs to think in the first place what to watch and where to find it, the actual activity while watching a video online does not differ significantly from watching a tv show or movie. The positive effects from switching the devise vanished after a short period of time.
In addition, the argument also does not take into account negative effects of extensive computer activity. Although the two-way interaction on the computer is beneficially for the brain and mental activity in the first place, potential long-term effects of extensive computer consume are not analyzed by the author. It can be that the brain activity is higher computer activity for the first one or two ours, but the brain activity significantly reduces thereafter and again lower regions of the brain take over to coordinate interactions with the machine. As for example searching for new shoes involves repeating steps performed in front of the computer, the brain recognizes the pattern and shifts it to the lower regions of the brain. This will then also lead to reduced mental activity and exhaustion.
Summing these findings up, it can be shown that the author omits essential parts of argument and the paragraph is therefore failing to achieve its intention. The potential positive effects on the brain activity of television consume, missing proof of adverse effects of watching television and potential adverse long-term effects of computer activity show that this claim is poorly presented and flawed in its argumentation
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