Background & Theory
The Thomas Aptitude assessment (also known as the General Intelligence Assessment, or GIA), was developed over 15 years by Dr Peter Dann in the Human Assessment Laboratory at the University of Plymouth. Thomas integrated the assessment into its product suite in 2006.
Intelligence has been defined as having fluid and crystallised components (Horn & Cattell, 1966):
Fluid Intelligence (pure processing speed) – basic intellectual processes of manipulating abstract concepts, generalisations and logical relationships (Carroll, 1993). Fluid intelligence is used to solve new problems, use logic in new situations and identify patterns. Crystallised Intelligence (learnt factors) –verbal, mechanical, and numerical ability etc. Crystallised intelligence is the ability to use learned knowledge and experience.
The Aptitude assessment is designed and theoretically underpinned by Carroll's taxonomy/classification of cognitive abilities components of 'g', which is general intelligence (Spearman's & others' general factor of mental performance). However, the assessment is concerned much more with fluid intelligence and the use of procedural rather than declarative knowledge, by measuring elementary cognitive abilities (perceptual speed, verbal reasoning etc.). This assesses what we have termed trainability rather than 'IQ'.