Fluid Intelligence (Gf) Explained: What It Is and How It's Measured
Marcos Hernanz
Founder & CEO
Fluid intelligence (often abbreviated Gf) is the ability to solve new problems, reason, and spot patterns in unfamiliar situations.
It's different from crystallized intelligence (knowledge you've learned).
Why Gf matters
Gf is strongly connected to:
- learning new skills,
- adapting to novelty,
- complex problem-solving.
It is also one reason people get interested in working-memory training.
Start with the foundation: Working memory explained.
How fluid intelligence is measured
Gf is often measured using tasks that require pattern discovery and reasoning.
Examples include matrix reasoning problems (similar to Raven-like tasks) and other abstract reasoning measures.
Important: tests can be influenced by many factors (sleep, motivation, familiarity), so single measurements are noisy.
How working memory relates to Gf
Working memory provides the "workspace" you use while solving problems.
When the workspace is overloaded:
- you lose intermediate steps,
- you make more errors,
- you get derailed by distractions.
That is one reason working memory and Gf correlate.
Where n-back fits
N-back is a working-memory task.
The controversial question is whether training it improves Gf.
Read:
If you want to try n-back in a practical way, use How to train n-back (4-week plan).
Try Cogniba
If you want structured training and progress tracking:
Further reading
- Au et al. (2014). https://doi.org/10.3758/s13423-014-0699-x
- Simons et al. (2016). https://doi.org/10.1177/1529100616661983