Chronic media multitasking is increasingly common, yet it challenges human cognition. This study compared heavy (HMM) and light (LMM) media multitaskers on cognitive control dimensions. HMMs showed greater susceptibility to interference from irrelevant stimuli and representations in memory, leading to worse performance on task-switching tests. These results suggest that heavy media multitaskers have a distinct approach to information processing, potentially due to reduced ability to filter out interference. HMMs were less effective in filtering out irrelevant stimuli from the environment and irrelevant representations in memory, as shown in filtering tasks and two- and three-back tasks. They also had higher switch costs in task-switching, indicating difficulty in suppressing irrelevant task sets. However, no significant differences were found in working memory capacity between HMMs and LMMs. The study also found no significant differences in broader cognitive measures such as SAT scores, creativity, or personality traits between the groups. These findings suggest that heavy media multitaskers may have a broader attentional bias, leading to greater susceptibility to distractions. The results highlight the importance of understanding how media multitasking affects cognitive control and its implications for learning and information processing in the digital age.Chronic media multitasking is increasingly common, yet it challenges human cognition. This study compared heavy (HMM) and light (LMM) media multitaskers on cognitive control dimensions. HMMs showed greater susceptibility to interference from irrelevant stimuli and representations in memory, leading to worse performance on task-switching tests. These results suggest that heavy media multitaskers have a distinct approach to information processing, potentially due to reduced ability to filter out interference. HMMs were less effective in filtering out irrelevant stimuli from the environment and irrelevant representations in memory, as shown in filtering tasks and two- and three-back tasks. They also had higher switch costs in task-switching, indicating difficulty in suppressing irrelevant task sets. However, no significant differences were found in working memory capacity between HMMs and LMMs. The study also found no significant differences in broader cognitive measures such as SAT scores, creativity, or personality traits between the groups. These findings suggest that heavy media multitaskers may have a broader attentional bias, leading to greater susceptibility to distractions. The results highlight the importance of understanding how media multitasking affects cognitive control and its implications for learning and information processing in the digital age.