Tuesday, March 13, 2007

IQ, EQ and Real Success

Congratulations, Eileen! Your IQ score is 138

"This number is based on a scientific formula that compares how many questions you answered correctly on the Classic IQ Test relative to others. Your Intellectual Type is Visionary Philosopher. This means you are highly intelligent and have a powerful mix of skills and insight that can be applied in a variety of different ways. Like Plato, your exceptional math and verbal skills make you very adept at explaining things to others — and at anticipating and predicting patterns. And that's just some of what we know about you from your IQ results. "

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I took this IQ Test back in March, and it seemed to be pretty accurrate, since as I go just about the same score as I did when I took similar test throughout the years in school. When I was professionally tested, I scored between 130 and 145, so this result of 138 makes sense.

I don't know how much IQ really matters, though. What does the fact that I have a "very superior" IQ that is higher than 99% of the population really mean? What bearing does it really have on my ability to be successful? I work as a Receptionist and I'm working on an M.Ed. focusing on Middle School Christian Education. I know I'm overqualified for my job and so does my boss, but I'm happy where I am for now. I used to work in a job that paid more, but I wasn't happy there so it wasn't worth it to me.

How do you really rate a person's ability to succeed? I think that depends at least partially on how you define, "sucess". I am happily married to a wonderful man. We are both active in our church. I'm working on continuing my education. I enjoy my job and get along well with the people who I work with; I may be overqualified for my job, but I do it well, and my hard work is appreciated. Am I successful? I don't make a lot of money, but does that mean I'm not successful? I don't think so. Many people who the world (secular society) would label as "successful" aren't happy which causes them to make poor behavioral choices. I'm happy. I like my life.

How you define success is determined by your values -- what you see as being important in life. Do you value money, fame, advancement? What I see as being the most important things in my life are my faith and my family: everything else is secondary. I have my faith and my family -- I have what I need.

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IQ Test Scores: The Basics of IQ Score Interpretation

"What do you mean my child isn't gifted — he got 99 on those tests! That's nearly a perfect score, isn't it?"

"The criteria you handed out says 'a score in the 97th percentile or above.' Peter got an IQ score of 97! That meets the requirement, doesn't it?"

Comments like these are not unusual and indicate a complete misunderstanding of IQ test scores.

IQ stands for intelligence quotient. Supposedly, it is a score that tells one how "bright" a person is compared to other people. The average IQ is by definition 100; scores above 100 indicate a higher than average IQ and scores below 100 indicate a lower that average IQ. Theoretically, scores can range any amount below or above 100, but in practice they do not meaningfully go much below 50 or above 150.

Half of the population have IQ's of between 90 and 110, while 25% have higher IQ's and 25% have lower IQ's:

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Descriptive Classifications of Intelligence Quotients

IQ Description % of Population
130+ Very superior 2.2%
120-129 Superior 6.7%
110-119 High average 16.1%
90-109 Average 50%
80-89 Low average 16.1%
70-79 Borderline 6.7%
Below 70 Extremely low 2.2%
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Apparently, the IQ gives a good indication of the occupational group that a person will end up in, though not of course the specific occupation. In their book, Know Your Child's IQ, Glen Wilson and Diana Grylls outline occupations typical of various IQ levels:

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140 Top Civil Servants; Professors and Research Scientists.
130 Physicians and Surgeons; Lawyers; Engineers (Civil and Mechanical)
120 School Teachers; Pharmacists; Accountants; Nurses; Stenographers; Managers.
110 Foremen; Clerks; Telephone Operators; Salesmen; Policemen; Electricians.
100+ Machine Operators; Shopkeepers; Butchers; Welders; Sheet Metal Workers.
100- Warehousemen; Carpenters; Cooks and Bakers; Small Farmers; Truck and Van Drivers.
90 Laborers; Gardeners; Upholsterers; Farmhands; Miners; Factory Packers and Sorters

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IQ Expressed in Percentiles

IQ is often expressed in percentiles, which is not the same as percentage scores, and a common reason for the misunderstanding of IQ test scores. Percentage refers to the number of items which a child answers correctly compared to the total number of items presented. If a child answers 25 questions correctly on a 50 question test he would earn a percentage score of 50. If he answers 40 questions on the same test his percentage score would be 80. Percentile, however, refers to the number of other test takers' scores that an individual's score equals or exceeds. If a child answered 25 questions and did better than 50% of the children taking the test he would score at the 50th percentile. However, if he answered 40 questions on the 50 item test and everyone else answered more than he did, he would fall at a very low percentile — even though he answered 80% of the questions correctly.

On most standardized tests, an IQ of 100 is at the 50th percentile. Most of our IQ tests are standardized with a mean score of 100 and a standard deviation of 15. What that means is that the following IQ scores will be roughly equivalent to the following percentiles:

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IQ Percentile
65 01
70 02
75 05
80 09
85 16
90 25
95 37
100 50
105 63
110 75
115 84
120 91
125 95
130 98
135 99

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An IQ of 120 therefore implies that the testee is brighter than about 91% of the population, while 130 puts a person ahead of 98% of people.

A person with an IQ of 80 is brighter than only 9% of people, and only a few score less than 60.

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