Evaluation of an iq test essays

Evaluation of an iq test essays Evaluation of an IQ test : Analysing the Reliability and Validity of the Psygat This study involved the examination of a newly developed intelligence test, the Psygat, in order to assess its reliability and construct validity. A group of 268 psychology students, with an average age of 22.37 were asked to complete the Psygat tests after completing two other intelligence tests, a Culture Fair test and a Verbal IQ test. The results of the Psygat were then analysed for internal reliability through a split half analysis based on age. The construct validity of the Psygat was examined through the analysis of the test scores against the other two intelligence tests. The hypothesis that the test would show significant internal reliability as well construct validity when measured against the other two tests was supported, although inconsistencies with the Culture Fair IQ test were detected for the younger age group. It was concluded that the evidence suggests that the Psygat is a test that could be validly used as an assessment of verbal intelligence, but further investi gation is required regarding the tests use for the assessment of culture fair parameters. While countless intelligence tests have been developed over the last century, the need for strict policing over the construction and administration of tests in order to prevent misuse has been well established. As far back as 1944 Lawson (1944,1992) identified significant problems with the construction and use of intelligence tests and proposed strict guidelines. Since then, the number of tests in common use has increased dramatically, with their importance in the functioning of the community being advanced considerably. However, despite the best efforts of the international psychology community, concern has been growing in recent years over the misuse of psychological testing, including intelligence tests (Turner et al, 2001, Daniel 1997), with at least some of this concern being dire...

Coulombs Law Definition in Science

Coulomb's Law Definition in Science Coulombs law is a physical  law stating the force between two charges is proportional to the amount of charge on both charges and inversely proportional to the square of the distance between them. The law is also known as Coulombs inverse square law. Coulombs Law Equation The formula for Coulomb law is used to express the force through which stationary charged particles attract or repel one another. The force is attractive if the charges attract each other (have opposite signs) or repulsive if the charges have like signs. The scalar form of Coulombs law is:F kQ1Q2/r2 or F ∠ Q1Q2/r2wherek Coulombs constant (9.0Ãâ€"109 N m2 C−2) F force between the chargesQ1 and Q2 amount of charger distance between the two charges A vector form of the equation is also available, which may be used to indicate both the magnitude and direction of the force between the two charges. There are three requirements which must be met in order to use Coulombs law: The charges must be stationary with respect to each other.The charges must be non-overlapping.The charges must be either point charges or else otherwise spherically symmetrical in shape. History Ancient people were aware certain objects could attract or repel each other. At the time, the nature of electricity and magnetism was not understood, so the underlying principle behind magnetic attraction/repulsion versus the attraction between an amber rod and fur was thought to be the same. Scientists in the 18th century suspected the force of the attraction or repulsion diminished based on the distance between two objects. Coulombs law was published by French physicist Charles-Augustin de Coulomb in 1785. It may be used to derive Gausss law. The law is considered to be analogous to Newtons inverse square law of gravity. Sources Baigrie, Brian (2007). Electricity and Magnetism: A Historical Perspective. Greenwood Press. pp. 7–8. ISBN 978-0-313-33358-3Stewart, Joseph (2001). Intermediate Electromagnetic Theory. World Scientific. p. 50. ISBN 978-981-02-4471-2