Intelligence is not the same as Intelligence Quotient (IQ). IQ is an estimation and a measurement of an individual’s intelligence. Human intelligence is assessed by IQ scores determined by standardized IQ tests.
Sir Francis Galton was the first expert who attempted to create a standardized test measuring intelligence in 1884. He theorized a correlation between intelligence and observable human traits such as reflexes and head size.
There are many types of IQ tests, which include a variety of content. There are verbal linguistic tests, numerical-mathematical tests, spatial-visual tests, logical-abstract tests, mixed tests, and culture fair tests.
Raymond Cattell, in 1963 introduced two types of cognitive abilities in a revision of Spearman's G factor concept of general intelligence: fluid intelligence (Gf) and crystallized intelligence (Gc).
If your scores on IQ tests are not high, there is no need to worry. Intelligence comes in many forms, and some cannot be assessed by modern intelligence tests.
Emotional intelligence (EI), or else emotional quotient (EQ), is the ability of individuals to perceive, use, understand, manage, and handle emotions.
There are four main components in human intelligence: verbal intelligence, numerical intelligence, logical intelligence, and spatial intelligence. Each of them represents a separate cognitive domain of intelligence, but with a single underlying factor that governs all of them: g factor (or general intelligence factor) of psychometrics.
It is assumed that all IQ score measurements across the overall population will follow a normal probability distribution and have an equal number of measurements before and after the mean value.
Several studies suggest that IQ scores are highly correlated with job performance.
People in different professions have different average IQ scores. As professions
become intellectually more challenging, higher IQ scores become more important.