- People switch rapidly more often than they run two demanding streams without cost.
- Two tasks with overlapping time.
- It shows why “I can do both” is a risky story.
- Evidence for far transfer is mixed.
- Selective attention picks one channel.
- Dual-n-back-lite, running-span-lite (updating one stream), visual-search (one target among distractors).
Is true parallel multitasking possible?
People switch rapidly more often than they run two demanding streams without cost. Costs show up as slower times or more errors.
What is a dual-task paradigm?
Two tasks with overlapping time. Dual n-back pairs a letter stream with a spatial stream. That is one lab family, not the only definition of attention.
Why does a phone-and-drive example matter?
It shows why “I can do both” is a risky story. This site is not a simulator and not legal advice.
Does dual n-back raise IQ?
Evidence for far transfer is mixed. Getting better at dual-n-back-lite is expected if you repeat it; that is not a new deviation IQ.
How is this different from selective attention?
Selective attention picks one channel. Divided attention tries to keep two alive. Both can fail for different reasons.
What can I play?
Dual-n-back-lite, running-span-lite (updating one stream), visual-search (one target among distractors). None is a clinical IQ.
❓ People also ask
What Is Attention Control?
Attention control is the skill of holding a current goal and filtering noise — a side conversation, a flashing tab, or a flanking arrow on a screen. It overlaps working memory and inhibition, yet it is not a synonym for IQ, and a browser hit count is not a diagnosis. Labs time tightly controlled trials; this site offers lite practice only, with no clinical battery behind the score.
What Is Attention Control? →IQ and Income
Surveys often find a positive correlation between cognitive-test scores and later earnings, but the path is noisy: education, health, networks, discrimination, and luck all sit in between. A correlation is not a paycheck forecast, and a higher score on a web game here is not a raise, a credential, or a clinical IQ. Group charts never tell you one person’s worth or hiring outcome.
IQ and Income →Visuospatial vs Verbal
Cognitive batteries often split visuospatial puzzles from verbal ones so you can see different strengths, not a single destiny. A high spatial sketch and a high vocabulary can diverge; neither pattern is a diagnosis. Online letter-span or hidden-figures lite games sample a slice of those families — they are not Wechsler indexes, not clinical IQ composites, and not career oracles.
Visuospatial vs Verbal →What Is Cognitive Flexibility?
Cognitive flexibility is the ability to update a rule when the world changes — switching from color to shape, or from one task set to another, without staying stuck. It is one executive-function toy, not a full intelligence profile. Task-switch lite on this site is original practice with no age norms, no standard error, and no clinical IQ attached to the hit count.
What Is Cognitive Flexibility? →Test Norming Basics
Norming is how a published test turns a raw hit count into a number you can compare with a reference group of the same age. Without a documented sample, a standard deviation, and a date, a web score is just a count. This site’s games are not normed batteries and must not be read as a clinical IQ, a school placement, or a medical finding.
Test Norming Basics →