Are online IQ tests accurate? Take the quiz!


IQ tests have been used for everything from placing students in the most appropriate educational settings to determining an applicant's ability to meet the demands of a particular job. Just how accurate are these online tests? Take this quiz to find out!

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Question 1 of 20

What does the acronym "IQ" stand for?

intellect quota
interest query
intelligence quotient

... IQ stands for intelligence quotient.


Question 2 of 20

Which of these factors is NOT one of the three criteria required for accurate psychological testing?


... Psychological tests must be valid, reliable and standardized in order to maximize accuracy and acceptance.


Question 3 of 20

How do online IQ test results compare to those of industry-accepted offline tests?

The results are about the same.
Online tests underestimate IQ .
Online tests overestimate IQ.

... Online IQ tests tend to overestimate IQ compared to offline, professional testing.


Question 4 of 20

What is the correlation between scores for online IQ tests versus in-person tests?

0.5 or less
almost 1.0
virtually zero

... Online IQ test scores show a correlation of 0.2 to 0.5, which indicates a significant but imperfect relationship between these two means of testing.


Question 5 of 20

What is the correlation between scores on the various professional or industry-accepted IQ tests that are taken offline?

0.8 or higher
around 0.5
close to zero

... Offline IQ tests show a correlation of 0.8 or higher on average, which suggests a high level of accuracy and reliability.


Question 6 of 20

How much of your IQ is due to genetics?

10 percent
50 percent
90 percent

... Genetics accounts for around 50 percent of a person's IQ score.


Question 7 of 20

Of the three criteria required for an accurate IQ test, which is least likely to be found with online IQ tests?


... Given that online test takers work in their own unique environments, standardization is the most difficult factor to control with online IQ tests.


Question 8 of 20

Which of the three criteria required for IQ test accuracy relates to the test's ability to measure intelligence rather than knowledge or skills?


... Validity relates to a test's ability to measure intelligence, as opposed to knowledge or skills.


Question 9 of 20

Which of the three criteria required for IQ test accuracy relates to the test's ability to provide consistent results over time?


... Reliability means that a test will provide consistent results over time for an individual test taker.


Question 10 of 20

Which of the three criteria required for IQ test accuracy relates to the test's ability to provide a uniform testing experience for all test takers?


... A standardized test is one where all participants enjoy the same test-taking conditions or environment.


Question 11 of 20

What percentage of the population has an IQ between 85 and 115?

66 percent
85 percent
95 percent

... About two-thirds of the population has an IQ between 85 and 115, or one standard deviation away from the average score of 100.


Question 12 of 20

How have average IQ test scores changed over time?

stayed the same

... Average IQ test scores have increased by five or six points each decade for more than a century. Experts refer to this as the Flynn Effect.


Question 13 of 20

How much higher do participants score on online IQ tests compared to offline IQ tests?

two to three points
five to 30 points
40 to 60 points

... Depending on the test, online test takers score six to 28 points higher on average than they would with offline IQ tests.


Question 14 of 20

In his 1983 publication, who argued that IQ tests measure only a small area of intelligence, ignoring other areas?

Sigmund Freud
Thomas Friedman
Dr. Howard Gardner

... Gardner proposed the theory of multiple intelligences, many of which can't be measured using standard IQ tests.


Question 15 of 20

What's the standard error of measurement for offline, industry-accepted IQ tests?

30 to 50 points
10 to 15 points
two to three points

... Most offline IQ tests accurately measure IQ within two to three points.


Question 16 of 20

When was the first IQ test developed?


... The first IQ test was developed in France in 1905.


Question 17 of 20

What statistical value measures how well an IQ test measures intelligence?

Steinbeck's omega
Cronbach's alpha
Gardner's omega

... Cronbach's alpha serves as a measure of reliability and validity for IQ tests.


Question 18 of 20

What range does Cronbach's alpha, a measure of reliability and validity, fall into for most offline IQ tests?

0.94 to 0.98
0.71 to 0.75
0.13 to 0.17

... The standard offline IQ test features a reliability and validity measurement of 0.94 to 0.98, indicating a high level of accuracy.


Question 19 of 20

What range does Cronbach's alpha, a measure of reliability and validity, fall into for most popular online IQ tests?

0.13 to 0.18
0.54 to 0.58
0.81 to 0.88

... Online IQ tests provide a rating of 0.81 to 0.88, which is slightly lower than that of offline tests.


Question 20 of 20

What IQ is considered by many to be the minimum score for a person of genius intelligence?


... People with IQs of 140 or better are widely considered to fall within the genius category.


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