IQ Tests – a Measure of Intelligence IQ stands for intelligence quotient and is one of the most common forms to measure intelligence. By taking an IQ test a person's powers of reasoning is expressed through the IQ test score he receives. The IQ test is increasingly used by parents and teachers to study and determine level of children but also by employers during job interviews. There are several IQ tests but the Wechsler Adult Intelligence Scale (WAIS) is the most common IQ test used internationally. The Netherlands and other Dutch countries often use the Groningen Intelligence Test (read more). An IQ test consists of several test items to determine the cognitive abilities of a person. It includes words, numbers and images that the test taker needs to analyze. A person's numerical intelligence (ability to do mathematics), spatial intelligence (ability to solve difficult spatial problems), logical intelligence (ability to reason) and verbal intelligence (ability to understand language) are all tested by an IQ test. There are also special IQ tests for the deaf and hearing impaired. These are called nonverbal IQ tests. Nonverbal IQ tests measure nonverbal intelligence. Takers of nonverbal IQ tests are required to recognize and remember visual sequences, concepts, and analogies. Nonverbal IQ tests are more specifically meant for people with language disabilities. The results show which tasks cost more or less effort to analyze by the test taker. An IQ test is an intelligence test that provides a relative measurement. A person's score is determined relative to the scores of other people in his age group which is called the norm group. The score says something about his intelligence compared to the rest of the people. The norm group, on which the test score is based, has an average score of 100 and a standard deviation of 15. The interpretations of the scores of the WAIS IQ test illustrate this. Intelligence is difficult to measure because it has so many different aspects and is related with so many things. To receive a completely reliable and valid IQ test score which is based only the IQ test is not realistic. Various causes, such as poor sleep, can affect the results of an IQ test. Furthermore, the results of an IQ test can be manipulated by taking many practice IQ tests before actually taking an IQ test. Taking practice IQ tests can increase a person's IQ test score by ten percent. The score received on an IQ test should not be the only factor to measure intelligence. There are many IQ tests available on the Internet and they are free. In most cases most free online IQ tests do not provide reliable results. Free online IQ tests give an overall picture of the challenges a person can expect and the way he can expect to respond when taking a time based test but a valid score is not very likely. A reliable IQ test is normally composed of at least 30 questions and should be conducted by a reputable publisher with an independent and impartial IQ test center. A reliable IQ test should also make known the standards from which it is created.
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