What is the standard deviation for the WAIS-IV?

15
The WAIS-IV was standardized on a sample of 2,200 people in the United States ranging in age from 16 to 90. An extension of the standardization has been conducted with 688 Canadians in the same age range. The median Full Scale IQ is centered at 100, with a standard deviation of 15.

What is the standard deviation for scores on the Wechsler IQ test?

Scores on the Wechsler Adult Intelligence Scale (a standard IQ test) are approximately normally distributed within age groups. For the 20-34 age group, the mean is 110 and the standard deviation is 25. For the 60-64 age groups, the mean is 90 and the standard deviation is 25.

What is the common standard deviation for an IQ test?

While different test publishers utilize different scoring systems, for many modern IQ tests the average (or mean) score is set at 100 with a standard deviation of 15 so that scores conform to a normal distribution curve.

How hard do locomotives pull?

An important measure of the performance of a locomotive is its “adhesion,” which is the locomotive’s pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomotive varies in actual use according to a Normal distribution with mean u=0.37 and standard deviation o = 0.04.

What is the highest IQ score on the WAIS-IV?

One Full Scale IQ (FSIQ) is also calculated. These scores range from the lowest (40) to the highest (160) points. Subtests are given for additional examination of processing abilities.

What is 2 standard deviations above IQ?

2. The two-standard-deviations rule implies that about 5 percent of the population have IQ scores more than 30 points away from 100: 2.5 percent above 130 and 2.5 percent below 70. 3.

What’s a good score on the WAIS-IV IQ test?

What’s A Good Score on the WAIS-IV IQ Test? The Wechsler Adult Intelligence Scale is normed so that 100 is the median score for the adult population. Scores of 90-109 are considered to be in the average range, and the average IQ of all high school graduates is 105.

What is the current version of the WAIS-IV?

The current version of the test, the WAIS-IV, which was released in 2008, is composed of 10 core subtests and five supplemental subtests, with the 10 core subtests comprising the Full Scale IQ. With the new WAIS-IV, the verbal/performance subscales from previous versions were removed and replaced by the index scores.

What is a good score on the Wechsler IQ test?

Wais Score Interpretation. The Wechsler Adult Intelligence Scale-IV (WAIS-IV) is an IQ test that is given by psychologists and measures global intellectual functioning. It includes both verbal and nonverbal components. The average score for all tests and subtests is 100; thus, a score of over 100 is above average and below 100 is below average.

How do I access the full complement of WAIS-IV subtests?

Access the full complement of WAIS-IV subtests with the tap of a button. Create custom batteries by combining subtests from the WAIS–IV and other tests such as the WMS-IV. Standardize administration and simplify the management of WAIS-IV materials so you can focus on what is important – the examinee.