Borderline intellectual functioning, previously called borderline mental retardation (in the ICD-8), is a categorization of intelligence wherein a person has below average cognitive ability (generally an IQ of 70–85), but the deficit is not as severe as intellectual disability (below 70).
70 to 84: Borderline mental disability. 85 to 114: Average intelligence. 115 to 129: Above average or bright. 130 to 144: Moderately gifted.
Based on the 68-95-99.7 Rule, approximately 68% of the individuals in the population have an IQ between 85 and 115. Values in this particular interval are the most frequent. Approximately 95% of the population has IQ scores between 70 and 130. Approximately 99.7% of the population has IQ scores between 55 and 145.
1. The one-standard-deviation rule implies that about 32 percent of the population have IQ scores more than 15 points away from 100: 16 percent above 115 and 16 percent below 85.
Most scores are somewhere between 85 and 115. Those scores are considered the "average" or normal intelligence range.
Scores between 80 and 89 are classified as low average. So in most cases, if you receive an IQ score of around 100, then you have what is considered an average IQ. Don't worry—you are in good company. Most people score within one standard deviation of this average.
FAQs (Frequently Asked Questions) When did Elon Musk take an IQ test? The Tesla CEO is estimated to have an IQ score of around 155.
Does an individual's IQ change with age? An individual's IQ does not change with age. In other words: if you did an IQ test now and then another one in 10 years' time, your IQ score will probably be very similar. This is because IQ is always measured relative to other people your age.
People between 65 and 69 years of age have an average IQ score of 114, which puts them in the superior intelligence or above-average end of the scale. But people between 70 and 74 years who are tested for IQ get an even higher average score of 119.
What is a normal IQ for a child? Though there are different average IQ scores for various age levels, the average for most children is 100, though scores will vary. Most children will fall between 80 and 120 if they are tested when they have a basic understanding of cognitive concepts.
But people with borderline intellectual functioning, or an IQ between 70 and 85, do comprise a vulnerable group. Genetic liability, biological causes such as perinatal difficulties, and epigenetic factors such as socioeconomic status and maternal stress all contribute to borderline intellectual functioning.
The lowest IQ ever would be 0. However, no one has ever scored that. Scores below 75 usually indicate a cognitive disability.
But genetics can explain the wide range of possible IQs too because so many different genes are involved in developing and running a brain. It is possible, for example, to inherit all the higher IQ genes from each parent and leave the lower IQ ones behind. Now the child will be brighter than the parent.
Encourage questions. If you want to help less intelligent people learn, you need to make them feel comfortable asking questions. If they feel intimidated by your superior intellect, they may be ashamed to show their lack of knowledge by asking questions, which will inhibit them from learning anything new.
Borderline intellectual functioning, previously called borderline mental retardation (in the ICD-8), is a categorization of intelligence wherein a person has below average cognitive ability (generally an IQ of 70–85), but the deficit is not as severe as intellectual disability (below 70).
The average child's IQ is not stable until around four years of age. It may be much later in children who were born early or who have significant health issues.
Like most aspects of human behavior and cognition, intelligence is a complex trait that is influenced by both genetic and environmental factors.
Mark Zuckerberg: The co-founder of Facebook, Zuckerberg has an IQ estimated to be around 152. Elon Musk: The founder of SpaceX, Tesla, Neuralink, and other companies, Musk has an IQ estimated to be around 155.
Conversation. : FACTS: According to IMDB, Snoop Dogg's IQ score is 147, which is considered to be extremely high and that of a gifted genius.
Kanye says he scored a 133 on Mensa IQ test, compares his brain to women's bodies.
Plot. In 1981, a man named Forrest Gump recounts his life story to strangers who happen to sit next to him at a bus stop. As a boy in 1956, Forrest has an IQ of 75 and is fitted with leg braces to correct a curved spine.
Diagnosing Intellectual Disability
A full-scale IQ score of around 70 to 75 indicates a significant limitation in intellectual functioning. However, the IQ score must be interpreted in the context of the person's difficulties in general mental abilities.
Scores of 80 to 89 are considered low average. Scores of 70 to 79 are considered borderline impaired. Scores of 55 to 69 are considered a mild impairment. Scores of 40 to 54 are considered a moderate impairment.