Since Binet's IQ test was developed, many types of IQ tests have been developed.
Raven's Progressive Matrices (RPM)
Developed by British psychologist John Carlyle Raven, this test is probably the most familiar IQ test to the public. Today, most of the IQ tests available on the Internet are similar to the Raven Progressive Matrix (Raven's Matrix). Because it uses non-verbal questions and is intuitive to solve, it is one of the most commonly applicable IQ tests for all ages and cultural differences.
The problem consists of a geometric pattern with one missing pattern in the form of a 2x2-6x6 square matrix. Test takers must complete the missing matrix by choosing one of the 6-8 options given as correct answers.
There are several versions of RPM:
Standard Progressive Matrices(SPM)
The first version of RPM, released in 1938, is in Standard Progressive Matrices(SPM) format. Since it has the advantage of being a non-verbal test that can be applied to illiterate, a 20-minute SPM was developed during World War II, which was used usefully at the army. It was first used in Britain and quickly spread to armies around the world.
The questions are displayed in a black pattern on a white background, and consist of 5 sets of 12 items each.
Colored Progressive Matrices(CPM)
Colored Progressive Matrices(CPM) was published with SPM. CPM induces visual stimulation of test takers by adding color to some questions to make it easier for children aged 5-11 years, the elderly, and people with disabilities to take the test.
Advanced Progressive Matrices(APM)
Advanced Progressive Matrices(APM) consists of 24 or 36 sets of 12 items each. It is suitable for people with above average intelligence.
Wechsler Intelligence Scale
The Wechsler Intelligence Scale is an intelligence test developed by Romanian-American psychologist David Wechsler. It was developed with reference to many tests, including the Binet Intelligence Scales, Army Alpha Test, and Army Beta Test mentioned in previous posts. It is the most used test method in the world, and the most reliable test and the only intelligent test that can be used as legal material. It has several types of tests and can be used to identify gifted children, individuals' cognitive characteristics, the strengths and weaknesses of each intelligence area.
This test takes long time and is not a problem type. It is conducted by the test taker verbally and acting as directed by a clinical psychologist(A professional who is qualified as an examiner must be required).
Wechsler Adult Intelligence Scale(WAIS)
After the publication of the Wechsler-Bellevue Intelligence Scale Form(WB-I, WB-2) in 1946, it was revised to the Wechsler Adult Intelligence Scale(WAIS-I) in 1955. Currently, it has been published until WAIS-IV.
Wechsler Adult Intelligence Scale(WAIS) is applicable to 16 to 90 years old people. Verbal comprehension, perceptual reasoning, working memory, and processing speed are measured through 10 tests.
Wechsler Intelligence Scale for Children(WISC)
Wechsler Intelligence Scale for Children(WISC) is a test applicable to children aged 6 to 16 years, and has now been published until WISC-V. Measures the Verbal Comprehension, Visual Spatial, Fluid Reasoning, Working Memory, and Processing Speed through 21 subtests.
Wechsler Preschool and Primary Scale of Intelligence(WPPSI)
Wechsler Preschool and Primary Scale of Intelligence(WPPSI) is a test that can be applied to children aged 2 to 7 years, and it has been revised since the first test, WPPSI-I, was published in 1967, and has now been published until WPPSI-IV. Contains 14 subtests and can be used to identify general intellectual functioning, innate talents, cognitive development or learning disabilities.
Figure Reasoning Test(FRT)
The Figure Reasoning Test (FRT) is an intelligence test developed in 1949 by John Clifford Daniels. Some of the Mensa test questions, non-verbal problems, are organized in this FRT format.
There are many types of question structures in FRT, from a simple list of patterns in one line to a matrix structure like Raven's Progressive Matrices. For example, 4 patterns are listed, and the pattern to come next can be selected from 4 examples.
Precautions when using the Internet IQ tests
Some suspicious Internet IQ tests introduce themselves that they use the RPM format, but they don't even follow the basic RPM format. They have characteristics that share almost similar questions, but the root of the test is unknown.
Remember that RPM uses square matrices for the problem.
In most cases, these suspicious tests typically use 2x3 or 3x2 matrices. These tests seem to have been made by simply extracting a part of Raven's Progressive Matrices(RPM) or combining RPM format with Figure Reasoning Test(FRT).
Since it is not a square matrix, the number of possible combinations is low, providing limited information that makes it difficult for test takers to understand the pattern of the question. So, the question becomes overly easy or difficult, and you can get results that are quite different from your actual IQ.