Number & Letter Series

What it measures

Complete the pattern: freshly generated numeric and alphabetic sequences at graded difficulty.

Paradigm after Condon, D. M., & Revelle, W. (2014). The international cognitive ability resource. Intelligence, 43, 52–64.

Validity & honesty

Items are procedurally generated without population norms — scores are your own trend over time, not an IQ.

Cadence: a retake every 2 days is advised. You can retake anytime — early retakes are scored normally and flagged in trend analysis.

Before you start

• · ~8 min, one sitting
• · 45 s per item, no going back on timed items
• · items can be skipped

Your history

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