Speed Processing Index
Speed Processing Index is built on the simple/choice reaction-time paradigm established by Arthur Jensen's chronometric research — one of the foundational bodies of work linking raw processing speed to general cognitive ability. Every task here is deliberately trivial in difficulty (string matching, basic arithmetic, number comparison, category judgment) so that response time, not problem difficulty, is what's actually being measured.
Your answers save as you go, so you can stop and resume.
What this measures
Processing Speed
Speed and accuracy on simple, low-difficulty judgments.
Feeds your Brain Profile
How it's structured — 4 parts
- 1
Same or Different
Judge whether two strings are identical.
10 questions
- 2
Arithmetic Check
Judge whether a simple arithmetic statement is true or false.
10 questions
- 3
Number Comparison
Judge the relationship between two numbers.
10 questions
- 4
Category Check
Judge whether a word belongs to a stated category.
10 questions
Question formats
How your score is banded
| Band | Score range |
|---|---|
| Developing | 0–30 |
| Average | 31–50 |
| Strong | 51–70 |
| Very Strong | 71–85 |
| Exceptional | 86–100 |