Public domain scientific intelligence test available for use in research

PEBL is a free open source programming language to help construct psychological experiments. A wiki and developer community provide some documentation and support.

PEBL has a Psychological Test Battery of many common or simple psychological tests so you may be able to use it out of the box without constructing your own test. PEBL includes free versions of many accredited and popular psychometric tests.

Many of them represent the only Free version of proprietory tests available anywhere. They include a free Iowa Gambling Task, a free version of the TOVA®, a free Wisconsin Card Sort Test®, a free version of Conners Continuous Performance task, and a number of other useful tasks, with more to come.

If one of the included tests does not suit your needs, you or a programmer can create your own tests with PEBL's programming language which is customized specifically to create psychometric tests.

Gf/Gc Quickie Test

The Gf/Gc Quickie Test Battery (Stankov, 1997) is a one-on-one administered intelligence test. It is designed for teaching purposes, but has been used in research.

The Gf/Gc Quickie Test Battery is a collection of tasks used by psychologists to assess human cognitive abilities. It is derived from within the framework of fluid and crystallized intelligence (Horn & Cattell, 1966), which is outlined below. This battery is designed for teaching purposes and the scores obtained must not be regarded as reflecting an “intelligence quotient”.

Here is a link to the test items and administration manual: https://klingenstein09.wikispaces.com/file/view/Sample_Cognitive_Tests.docx

Stankov, L. (1997). The Gf/Gc Quickie Test Battery. Unpublished test battery from the School of Psychology. Australia: University of Sydney.

ICAR: INTERNATIONAL COGNITIVE ABILITY RESOURCE

This project is an attempt to develop a public-domain assessment tool for cognitive abilities. It is being developed by several leading researchers in individual differences.

https://icar-project.com/

You need to register to access a short measure of cognitive ability. They have sample items and a range of resources.

Condon, D. M., & Revelle, W. (2014). The International Cognitive Ability Resource: Development and initial validation of a public-domain measure. Intelligence, 43, 52-64.

Quantified mind is a collection of many tests with published papers. Its free and batteries are easy to customize, but only works online and converts the raw measurements of each test into a score for that item.