Assessing a completed block and building the next one is how cognitive training actually works long term. The brain adapts the same way the body does. Expose it to the same stimulus repeatedly and it stops being challenged. A structured assessment process tells you exactly what changed, what did not, and what the next block needs to focus on.
Why Baselines Matter
A baseline at the start and end of every block exists for one purpose. It tells you whether the athlete actually adapted.
Cognitive adaptation is invisible unless measured. Two athletes can complete the same tasks with the same effort and their data can tell completely different stories. Some demands improve quickly, some stall, and some may not shift at all. This is normal. Cognitive adaptation is rarely balanced across all demands.
Think of it the same way as physical training. If an athlete finishes a strength block with strong quads but weak hamstrings, the next block targets the imbalance. Cognitive training works exactly the same way. The baseline shows you where the athlete improved and where the next block needs to focus. Without it you are guessing.
The Three Metrics and the 5% Rule
When assessing a completed block, three metrics matter most: Reaction Time, Variation, and Accuracy. Always read them together. No single metric gives you the full picture.
To confirm genuine adaptation, all three metrics must each improve by at least 5%. Not a combined average of 5%. Each one individually. This rule exists because athletes can improve one metric at the expense of another. Reaction time can get faster while accuracy drops. Variation can stabilise while reaction time slows. When you require all three to improve, you confirm that real, balanced adaptation has happened.
If only one or two metrics hit the threshold, adaptation is partial. The block created some improvement but not complete adaptation. Note which metrics improved and which did not. That tells you exactly where to focus the next block.
Reading Strengths and Weaknesses
Once you have the baseline comparison, break down every task by cognitive demand. You will see clearly which demands improved, which stalled, and which produced errors, slowdowns, or high variation under load.
A demand that improved across all three metrics is a strength. A demand that stalled or showed high variation or accuracy drops is a weakness. Weaknesses are not a negative sign. They are the most valuable information the baseline gives you. They tell you exactly where the brain needs more work and where the next block should focus its load.
Harder tasks create more adaptation because they push the brain closer to its limit. An athlete struggling on a task is not failing. It is a signal that the task is providing exactly the right stimulus for growth.
The 2:1 and 3:1 Ratios
Once you know the strengths and weaknesses, structure the next block using a training ratio. The ratio determines how much load the weak demand receives compared to the strong ones.
2:1 ratio
Use this when adaptation was generally good but uneven. Two tasks targeting the weak demand for every one task reinforcing the strength. The gap between strong and weak is moderate and this ratio corrects it without completely removing work on the strengths.
3:1 ratio
Use this when the athlete has a clear deficit in a specific demand. Three tasks targeting the weak demand for every one task reinforcing the strength. The gap is significant and requires more concentrated load to close it.
Both ratios apply at the session level or the task level within a session. You can dedicate more sessions to the weak demand, or simply choose more tasks targeting it within each session. Both approaches produce the same result.
The Loop
Every block follows the same repeatable cycle. Run it every time.
Run a baseline
Identify strengths and weaknesses
Build the next block using a 2:1 or 3:1 ratio
Run the block
Re-test at the end
Adjust the next block based on the results
When building the next block, four things to action. Analyze post-baseline performance and find the areas with the least improvement. Target those weak demands first. Apply modes to increase the challenge on those tasks. Adjust task parameters including intensity, duration, and placement within the session.
This cycle keeps training precise, targeted, and responsive to where the athlete actually is. Over time the athlete becomes faster, more consistent, more accurate, and more resilient under fatigue.
