General Intelligence Assessment (GIA)

The GIA provides an accurate prediction of a person's potential to grasp a new role/regime. It will help you identify your high flyers and give you the tools to understand how to develop them.

  • Measure mental capacity, including problem solving
  • Understand how to develop your people through training
  • Understand how quickly it will take an employee to adapt
  • Understand who has the skills to drive change
  • Ensure your people are sufficiently challenged
  • Identify potential leaders

How it works

The General Intelligence Assessment (GIA) measures an individual's aptitude in 5 key areas: Reasoning, Perceptual Speed, Number Speed & Accuracy, Word Meaning and Spatial Visualisation

5 Online Assessments

The GIA consists of 5 online assessments, including reasoning, perceptual speed, number speed and accuracy, word meaning and spatial visualisation.

Detailed Understanding

Gain a detailed understanding of a person’s mental capacity and how quickly they can grasp a new role/regime.

Understand General Intelligence

The overall percentile is an estimate of a candidate's general intelligence, while focusing on their response to training, mental processing speed, concentration and fast track potential.

General Intelligence Assessment Report

Assessment Information

Assessment type: Aptitude

Format: 5 assessments

Availability: 25+ languages

Time to complete:

Training required: GIA Accreditation

Validation: Registered with the British Psychological Society and audited against technical criteria established by the European Federation of Psychologists’ Associations

Background & Theory

The GIA was first developed as a way to measure conscious intellectual abilities and trainability of Armed Forces known as the British Army Recruitment Battery (BARB). It was then developed by Dr Peter Dann and has been part of the Thomas suite since 2006.

Intelligence can be defined as having fluid and crystallised components:

- Fluid intelligence (pure processing speed) – this is used to solve new problems, use logic in new situations and identify patterns.

- Crysallised intelligence (learnt factors) – This is the ability to use learned knowledge and experience.

The GIA is concerned with fluid intelligence and looks at an individual’s speed of processing information and ability to learn and develop new skills, rather than measuring ‘IQ’.

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Thomas International General Intelligence Assessment

Thomas International HTPI behavioural assessment


The General Intelligence Assessment consists of five online tests that rely on processes such as thought, language, decision making, learning and memory.

Each test measures a different cognitive function:

- Perceptual speed – measures the perception of inaccuracies in written material, numbers and diagrams, the ability to ignore irrelevant information and recognise similarities and differences.

- Reasoning – measures the ability to reason from information provided and to draw correct conclusions. It assesses the ability of an individual to hold information in their short-term memory and solve problems.

- Speed and accuracy – measures basic numerical reasoning. It measures the degree to which an individual can work comfortably with quantitative methods.

- Spatial visualisation – measures the ability to create and manipulate mental images of objects. It relates to the ability to work in an environment where visualisation skills are required to understand and execute tasks.

- Word meaning – assesses word knowledge and vocabulary by looking at the comprehension of a large number of words from different parts of speech and the ability to identify the words that have similar or opposite meanings.

The individual's score is determined by the speed and accuracy of their responses. Their scores are then compared to a norm group, to determine whether the scores are lower, higher or in-line with the majority of that population.

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