What happens if you have an IQ of 75?
An IQ score of around 75 indicates below average intellectual ability and some significant limitations in thinking skills. But IQ is just one measure of a person’s complex cognitive functioning. By looking at what IQ tests actually reveal, the real-life impacts of scoring 75, and ways to support growth, we can better understand this result. As both a data analyst and uncle of a boy with an IQ of 73, I’ve done extensive research to grasp what an IQ of 75 fully means.
When my nephew Thomas was diagnosed with an intellectual disability at age 10, my family had so many questions about what his IQ score would mean for his future. I dove into the research to help us understand, and I want to share some of that insight here. While every person is different, looking at the evidence can help us set appropriate expectations and ensure those with an IQ of 75 have the supports they need to thrive. Let’s explore this topic together!
Defining and assessing intelligence
IQ stands for intelligence quotient and it aims to measure a person’s general cognitive abilities compared to others their age. An IQ test evaluates skills like:
- Verbal comprehension – vocabulary, general knowledge
- Perceptual reasoning – visual puzzles, spatial awareness
- Working memory – remembering instructions and information
- Processing speed – time to solve problems
When broken into these specific skill areas, it becomes clear that intelligence is multifaceted. There are many ways of being smart!
IQ tests are controversial for how heavily they influence educational placements and diagnoses. Critics argue they are biased and incomplete measures of ability. But IQ tests do predict success in academic and work settings, so they remain widely used.
An average IQ score is 100. The “normal” range falls between 85 to 115, capturing 68% of people. The standard deviation is 15 points, so scores are designed to follow a bell curve distribution in the population.
Interpreting an IQ of 75
An IQ score between 70 to 75 indicates significant limitations in general mental abilities. According to the DSM-5 criteria, this level meets one prong of a diagnosis for intellectual disability, formerly known as mental retardation.
To receive this diagnosis, two other criteria must also be met:
- Deficits in adaptive functioning – difficulty with social skills, everyday tasks
- Onset during childhood developmental period
About 1% of the population has an IQ below 75 and meets the full criteria for intellectual disability. Specific learning disabilities are even more common, affecting 5-10% of people.
Having an IQ of 75 makes academic learning challenging. Additional educational supports are usually needed to make progress. Independent living is often achievable with guidance, though competitive employment in complex jobs is unlikely.
How common are different IQ levels?
Below is a table showing the percentage of the population that falls into different IQ score ranges. This gives perspective on how rare it is to score significantly below average.
| IQ Range | Classification | % of Population |
|---|---|---|
| 145-160 | Very superior | 0.1% |
| 130-144 | Superior | 2.1% |
| 115-129 | High average | 15.7% |
| 85-114 | Normal | 68.1% |
| 70-84 | Low average | 13.6% |
| 55-69 | Mild disability | 0.4% |
| 40-54 | Moderate disability | 0.1% |
As you can see, an IQ between 70-84 is still within the normal distribution, just on the lower end. Severe disability becomes very rare below an IQ of 55.
Famous high IQs for perspective
It’s interesting to look at examples of exceptionally high IQs scores as a contrast:
- Albert Einstein – Estimated IQ between 160-190
- Stephen Hawking – IQ of 160
- Garry Kasparov – IQ supposedly as high as 190
- Judit Polgar – IQ of 170, chess grandmaster
And some fictional characters also have high published IQs:
- Lisa Simpson – IQ of 159
- Sherlock Holmes – IQ estimated at 190
Of course, success depends on much more than high intelligence. Perseverance, creativity, emotional skills, and opportunity are also key factors.
Cognitive abilities associated with an IQ of 75
An IQ of 75 indicates challenges with:
- Executive functioning – handling planning, focus, multi-tasking
- Working memory and processing speed
- Generalizing learning and problem-solving
- Understanding abstract concepts
- Academic skills like reading comprehension and math
Those with an IQ around 75 often have a “concrete thinking” style. They comprehend ideas best when presented visually and tied to real-world examples. Instructions need to be broken down into clear step-by-step tasks. Doing schedules, reminders, and routines are helpful.
From observing my nephew Thomas, I see how he excels when given structure. But flexibility can still be a challenge. When plans suddenly change or he faces unfamiliar situations, he feels lost easily. We continue working on building adaptability, but also ensure his environment provides stability.
Changing IQ across the lifespan
It’s a myth that IQ stays stagnant across life. IQ can shift gradually due to:
- Brain development in adolescence
- Quality of education
- Enriching life experiences
- Cognitive decline in old age
Research shows the IQs of young children can fluctuate more substantially. Early interventions for those with intellectual disabilities focus on fostering cognitive growth when neuroplasticity is highest.
Educational experiences seem to raise IQ scores the most during childhood through young adulthood. Sustained effort and exposure to new ideas continue gradually contributing to intelligence during our lives.
Improving prospects for those with an IQ of 75
While an IQ of 75 signifies cognitive challenges, research shows we can absolutely improve prospects by:
- Early intervention services as young as ages 3-5
- Individualized education plans with tailored instruction
- Transition planning for adulthood starting by age 14
- Teaching practical life skills and strategies for independence
- Fostering social inclusion and relationships
- Ensuring accommodations in workplace or post-secondary settings
- Assistive technology tools for learning and memory
- Positive behavior supports and counseling as needed
With scaffolding and accommodations, many with an IQ around 75 can complete vocational education or live semi-independently. Developing self-confidence and social belonging are also key.
Valuing neurodiversity and supporting strengths
Beyond just looking at limitations associated with an IQ of 75, I think it’s vital we value neurodiversity and nurture strengths. Thomas taught me so much about focusing on people’s abilities, not just deficits on an IQ test.
He memorizes sports stats and radio commercials easily. He’s helpful, loyal, and enthusiastic. IQ tests don’t capture these assets.
Nurturing strengths and self-esteem helps engagement and behavioral challenges too. Thomas thrives when he feels competent and included. All people deserve chances to contribute their talents!
There’s more to life than IQ scores
Understanding IQ tests can help us set realistic expectations for those with significant cognitive disabilities. But remembering people’s humanity, individuality, and potential is just as crucial.
An IQ score of 75 or below does indicate some concrete limits in intellectual functioning. Daily life and learning will require adaptation and support. Still, with the right environment, people can craft fulfilling lives full of relationships and purpose.
If you have a loved one with an IQ in this range, don’t hesitate to reach out to me! I’m always happy to share resources and perspectives. As data nerds, we may value cognitive abilities. But life experience has taught me intelligence exists in many forms. There are endless ways to make a difference!
