The term “switch cost” in the passage implies that-

Comprehension:

Read the following passage carefully and answer the questions that follow:

Over the last decade, psychologists and cognitive scientists have observed a striking shift in the way young adults engage with information. One of the most frequently studied phenomena is digital distraction—the continuous fragmentation of attention due to notifications, multi-tasking and high-frequency screen engagement. Research from various cognitive labs indicates that task-switching, a behaviour commonly mistaken for multi-tasking, results in what is called a “switch cost”: a measurable decline in accuracy and processing speed whenever the brain toggles between competing inputs.

Young adults are particularly susceptible because their academic, social and professional spheres increasingly depend on digital platforms. Studies tracking screen-use patterns show that people aged 18–25 check their phones an average of 120–150 times a day, often without conscious awareness. Neuroimaging research suggests that such habitual checking stimulates the brain’s dopaminergic reward system, creating an anticipatory loop that reinforces the behaviour even when the content provides little value.

A less-discussed consequence is cognitive thinning—a term researchers use to describe the gradual reduction in deep-focus capacity. This does not imply long-term cognitive damage, but rather a reallocation of attentional habits. Individuals accustomed to rapid, low-effort information tend to experience greater difficulty sustaining concentration during tasks requiring extended reasoning, such as reading complex texts or solving multi-step problems.

Despite these concerns, experts emphasise that digital engagement itself is not harmful; rather its unregulated use is. Interventions such as timed screen breaks, structured “focus blocks” and switching devices to grayscale mode have been shown to reduce compulsive checking by altering reward expectations. Ultimately, the challenge for young adults is not the presence of technology but the cultivation of deliberate, self-regulated attention in an environment designed to compete for every second of cognitive bandwidth.