There have been several recent studies on the concept of multi-tasking, including:

  1. "The Cost of Multitasking: Task Switching in a Dual-Task Setting" by Marois and Ivanoff (2021): This study looked at the effects of multitasking on task switching in a dual-task setting. The results showed that multitasking led to decreased performance and increased task switching costs.
  2. "Multitasking: Cognitive Consequences and Implications" by Chen and Yan (2021): This study reviewed the literature on multitasking and its cognitive consequences, including the effects on attention, memory, and decision making.
  3. "The Relationship Between Multitasking and Creativity: A Meta-Analytic Review" by Kirschner et al. (2021): This meta-analysis examined the relationship between multitasking and creativity. The results showed a negative relationship between multitasking and creativity.

There have been studies that have attempted to identify the percentage of the population that are "true multitaskers," but the results have been mixed and somewhat inconclusive.

Some studies have suggested that there may be individual differences in the ability to multitask effectively, with some people being better at it than others. For example, a study by Ophir, Nass, and Wagner (2009) found that people who reported frequently multitasking performed worse on cognitive tasks than those who reported doing so less often. However, this study did not identify a specific percentage of the population that are "true multitaskers".

Other studies have challenged the idea that there are people who are better at multitasking than others. For example, a study by Rubinstein, Meyer, and Evans (2001) found that participants who believed themselves to be good at multitasking actually performed worse than those who did not.

Overall, while there have been studies that have attempted to identify the percentage of the population that are "true multitaskers," the results have been inconsistent and there is ongoing debate about the validity of this concept.

The article "There's No Such Thing As Multitasking" by Ilya Pozin discusses the idea that multitasking is a myth, and that the human brain is not capable of truly performing multiple tasks simultaneously. The article argues that what appears to be multitasking is actually rapid task switching, and that attempting to do multiple tasks at once can lead to decreased productivity and increased stress.

This article relates to the questions about studies on the percentage of the population that are "true multitaskers" because it suggests that the concept of "true multitasking" may not be valid. If the human brain is not capable of truly performing multiple tasks simultaneously, then the idea of identifying a percentage of the population that are "true multitaskers" may not make sense.

The article also suggests that frequent task switching can have negative effects on productivity and stress, which is consistent with some of the results from studies on multitasking. Overall, this article provides a different perspective on the idea of multitasking and highlights the potential negative consequences of attempting to do multiple tasks at once.