How the Estimation Works

The Formula

CL = 0.5 × Task Duration + 2.0 × Task Complexity − 1.5 × Prior Familiarity

Each input is multiplied by a fixed coefficient. The products are summed to produce the Cognitive Load Score. Identical inputs always produce identical outputs.

Input Variables

Task Duration (coefficient: 0.5)

Task Duration measures time investment in minutes. Each additional minute increases the Cognitive Load Score by 0.5 points. A 60-minute task contributes 30 points.

Task Complexity (coefficient: 2.0)

Task Complexity ranges from 1 (minimal) to 5 (very high). Each Task Complexity level adds 2.0 points. Maximum contribution at level 5 is 10 points.

Prior Familiarity (coefficient: −1.5)

Prior Familiarity ranges from 1 (none) to 5 (expert). Each Prior Familiarity level reduces the Cognitive Load Score by 1.5 points. Maximum reduction at level 5 is 7.5 points.

Classification Thresholds

The Cognitive Load Score maps to three fixed categories:

Low: Cognitive Load Score below 20 — the task requires minimal cognitive resources.
Medium: Cognitive Load Score from 20 to 49.9 — the task requires moderate cognitive resources.
High: Cognitive Load Score at 50 or above — the task requires substantial cognitive resources.

Verification Example

Input: Task Duration = 45 minutes, Task Complexity = 4, Prior Familiarity = 2.

CL = 0.5 × 45 + 2.0 × 4 − 1.5 × 2 = 22.5 + 8.0 − 3.0 = 27.5

Result: Cognitive Load Score = 27.5, classified as Medium (20 ≤ 27.5 < 50).