How the Estimation Works
The Cognitive Load Score is calculated using a deterministic formula that transforms three measurable input factors into a single quantitative output. Each input contributes a weighted value to the final score.
The Formula
This formula assigns fixed coefficients to each input variable. The coefficients represent the relative influence of each factor on cognitive load.
Input Variables
| Variable | Symbol | Range | Coefficient | Effect |
|---|---|---|---|---|
| Task Duration | x₁ | > 0 minutes | α = 0.5 | Each minute adds 0.5 points to the score |
| Task Complexity | x₂ | 1–5 (integer) | β = 2.0 | Each complexity level adds 2.0 points to the score |
| Prior Familiarity | x₃ | 1–5 (integer) | γ = 1.5 | Each familiarity level subtracts 1.5 points from the score |
Classification Thresholds
After the Cognitive Load Score is calculated, it is classified into one of three levels based on fixed thresholds:
Interpretation
Task Duration has a linear additive effect: longer tasks increase the score proportionally. Task Complexity has the strongest coefficient (2.0), meaning each level increase has double the impact of one minute of duration. Prior Familiarity reduces the score, representing the mitigating effect of existing familiarity on cognitive demand.
Verification Example
For inputs Task Duration = 45, Task Complexity = 4, Prior Familiarity = 2: