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An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. The abbreviation "IQ" was coined by the psychologist William Stern for the German term Intelligenzquotient, his term for a scoring method for intelligence tests at University of Breslau he advocated in a 1912 book.
Psychometrics is a field of study within psychology concerned with the theory and technique of measurement. Psychometrics generally refers to specialized fields within psychology and education devoted to testing, measurement, assessment, and related activities. Psychometrics is concerned with the objective measurement of latent constructs that cannot be directly observed. Examples of latent constructs include intelligence, introversion, mental disorders, and educational achievement. The levels of individuals on nonobservable latent variables are inferred through mathematical modeling based on what is observed from individuals' responses to items on tests and scales.
Human intelligence is the intellectual capability of humans, which is marked by complex cognitive feats and high levels of motivation and self-awareness. High intelligence is associated with better outcomes in life.
In statistics and psychometrics, reliability is the overall consistency of a measure. A measure is said to have a high reliability if it produces similar results under consistent conditions:
"It is the characteristic of a set of test scores that relates to the amount of random error from the measurement process that might be embedded in the scores. Scores that are highly reliable are precise, reproducible, and consistent from one testing occasion to another. That is, if the testing process were repeated with a group of test takers, essentially the same results would be obtained. Various kinds of reliability coefficients, with values ranging between 0.00 and 1.00, are usually used to indicate the amount of error in the scores."
Validity is the main extent to which a concept, conclusion or measurement is well-founded and likely corresponds accurately to the real world. The word "valid" is derived from the Latin validus, meaning strong. The validity of a measurement tool is the degree to which the tool measures what it claims to measure. Validity is based on the strength of a collection of different types of evidence described in greater detail below.
The g factor is a construct developed in psychometric investigations of cognitive abilities and human intelligence. It is a variable that summarizes positive correlations among different cognitive tasks, reflecting the fact that an individual's performance on one type of cognitive task tends to be comparable to that person's performance on other kinds of cognitive tasks. The g factor typically accounts for 40 to 50 percent of the between-individual performance differences on a given cognitive test, and composite scores based on many tests are frequently regarded as estimates of individuals' standing on the g factor. The terms IQ, general intelligence, general cognitive ability, general mental ability, and simply intelligence are often used interchangeably to refer to this common core shared by cognitive tests. However, the g factor itself is merely a mathematical construct indicating the level of observed correlation between cognitive tasks. The measured value of this construct depends on the cognitive tasks that are used, and little is known about the underlying causes of the observed correlations.
Cronbach's alpha, also known as tau-equivalent reliability or coefficient alpha, is a reliability coefficient that provides a method of measuring internal consistency of tests and measures. Numerous studies warn against using it unconditionally, and note that reliability coefficients based on structural equation modeling (SEM) are in many cases a suitable alternative.
Michael A. Persinger was an American-Canadian professor of psychology at Laurentian University, a position he had held from 1971 until his death in 2018. His most well-known hypotheses include the temporal lobes of the human brain as the central correlate for mystical experiences, subtle changes in geomagnetic activity as mediators of parapsychological phenomena, the tectonic strain within the Earth's crust as the source of luminous phenomena attributed to unidentified aerial objects, and the importance of specific quantifications for energy, photon flux density, and small shifts in magnetic field intensities for integrating cellular activity as well as human thought with universal phenomena.
In statistics and research, internal consistency is typically a measure based on the correlations between different items on the same test. It measures whether several items that propose to measure the same general construct produce similar scores. For example, if a respondent expressed agreement with the statements "I like to ride bicycles" and "I've enjoyed riding bicycles in the past", and disagreement with the statement "I hate bicycles", this would be indicative of good internal consistency of the test.
Construct validity concerns how well a set of indicators represent or reflect a concept that is not directly measurable. Construct validation is the accumulation of evidence to support the interpretation of what a measure reflects. Modern validity theory defines construct validity as the overarching concern of validity research, subsuming all other types of validity evidence such as content validity and criterion validity.
The Wechsler Adult Intelligence Scale (WAIS) is an IQ test designed to measure intelligence and cognitive ability in adults and older adolescents. The original WAIS was published in February 1955 by David Wechsler, as a revision of the Wechsler–Bellevue Intelligence Scale, released in 1939. It is currently in its fourth edition (WAIS-IV) released in 2008 by Pearson, and is the most widely used IQ test, for both adults and older adolescents, in the world.
Cognitive tests are assessments of the cognitive capabilities of humans and other animals. Tests administered to humans include various forms of IQ tests; those administered to animals include the mirror test and the T maze test. Such study is important to research concerning the philosophy of mind and psychology, as well as determination of human and animal intelligence.
The California Verbal Learning Test (CVLT) is one of the most widely used neuropsychological tests in North America. As an instrument, it represents a relatively new approach to clinical psychology and the cognitive science of memory. It measures episodic verbal learning and memory, and demonstrates sensitivity to a range of clinical conditions. The test does this by attempting to link memory deficits with impaired performance on specific tasks. It assesses encoding, recall and recognition in a single modality of item presentation (auditory-verbal). The CVLT is considered to be a more sensitive measure of episodic memory than other verbal learning tests. It was designed to not only measure how much a subject learned, but also reveal strategies employed and the types of errors made. The CVLT indexes free and cued recall, serial position effects, semantic clustering, intrusions, interference and recognition. Delis et al. (1994) released the California Verbal Learning Test for Children (CVLT-C). The California Verbal Learning Test-II (CVLT-II) is an updated version of the original CVLT, which has been standardized and provides normative data.
The Trail Making Test is a neuropsychological test of visual attention and task switching. It consists of two parts in which the subject is instructed to connect a set of 25 dots as quickly as possible while still maintaining accuracy. The test can provide information about visual search speed, scanning, speed of processing, mental flexibility, as well as executive functioning. It is sensitive to detecting cognitive impairment associated with dementia, for example, Alzheimer's disease.
The Australian Sheep-Goat Scale (ASGS) is a questionnaire conceived by Michael Thalbourne to determine the extent to which the respondent believes in the paranormal. The description "Australian" is given because the test was devised in Adelaide, South Australia, and to distinguish it from other nations' instruments. A person who believes in some aspect of the paranormal is termed a "sheep", and a disbeliever a "goat".
The Revised NEO Personality Inventory is a personality inventory that assesses an individual on five dimensions of personality, the so-called Big Five personality traits. These traits are openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism. In addition, the NEO PI-R also reports on six subcategories of each Big Five personality trait.
The McCarthy Scales of Children's Abilities (MSCA) is a psychological test given to young children. "the McCarthy scales present a carefully constructed individual test of human ability."
The Remote Associates Test (RAT) is a creativity test used to determine a human's creative potential. The test typically lasts forty minutes and consists of thirty to forty questions each of which consists of three common stimulus words that appear to be unrelated. The subject must think of a fourth word that is somehow related to each of the first three words. Scores are calculated based on the number of correct questions.
The Vineland Social Maturity Scale is a psychometric assessment instrument designed to help in the assessment of social competence. It was developed by the American psychologist Edgar Arnold Doll and published in 1940. He published a manual for it in 1953. Doll named it after the Vineland Training School for the Mentally Retarded, where he developed it.
The Comrey Personality Scales is a personality test developed by Andrew L. Comrey in 1970. The CPT measures eight main scales and two validity scales. The test is currently distributed by Educational and Industrial Testing Service. The test consists of 180 items rated on a seven point scale.
References
- Wayne Otto and Richard A. McMenemy, "An Appraisal of the Ammons Quick Test in a Remedial Reading Program," Journal of Educational Measurement, Vol. 2, No. 2 (Dec., 1965), pp. 193–198
- ↑ Diana S. Woodruff-Pak (1997). The neuropsychology of aging. Wiley-Blackwell. p. 39. ISBN 978-1-55786-455-0.
- ↑ Ammons, R. B.; Ammons, C. H. (2019-07-09). "The Quick Test (QT): Provisional Manual1,2". Psychological Reports. 11: 111–161. doi:10.1177/003329416201100106. S2CID 150260190.
- 1 2 Merenda, Peter F. (2016-11-17). "Book Review: The Quick Test (QT): Provisional Manual". Educational and Psychological Measurement. 25: 268–271. doi:10.1177/001316446502500140. S2CID 141249451.
- ↑ Mednick, Martha T. (1969-04-01). "The Validity of the Ammons' Quick Test of Intelligence". Psychological Reports. 24 (2): 388–390. doi:10.2466/pr0.1969.24.2.388. ISSN 0033-2941. S2CID 143273276.
- ↑ Jan D. Sinnott; Joan S. Rabin; Michael T. Windle (1986). Sex roles and aging: theory and research from a systems perspective. Karger Publishers. pp. 69–70. ISBN 978-3-8055-4207-4.
- ↑ Zagar, Robert John; Kovach, Joseph W.; Busch, Kenneth G.; Zablocki, Michael D.; Osnowitz, William; Neuhengen, Jonas; Liu, Yutong; Zagar, Agata Karolina (2013-12-01). "Ammons Quick Test Validity among Randomly Selected Referrals". Psychological Reports. 113 (3): 823–854. doi:10.2466/03.04.PR0.113x29z0. ISSN 0033-2941. PMID 24693814. S2CID 9347343.