About
Clear context for educational assessments
Cognitive Index provides self-guided practice and educational explanations. The site is not a clinical testing service, and its results should not be used as professional diagnoses or official credentials.
Supported assessments
The catalog currently includes an original IQ-style reasoning test, an AGCT historical practice form, and a public-domain Big Five personality questionnaire. Each introduction explains its format, price, and limitations.
Compare assessmentsLearning library
Guides cover score interpretation, measurement limits, assessment history, and responsible use of online results.
Open the libraryInterpret results cautiously
Online performance can vary with sleep, stress, interruptions, device setup, and familiarity. High-stakes educational, clinical, employment, or legal decisions require appropriately qualified professional guidance.