Related Experiment Video
Updated: Jul 20, 2026
10:26
Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities
Published on: September 11, 2021
IQ-based norms for highly intelligent adults.
Dorene M Rentz1, Lisa M Sardinha, Terri J Huh
1Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. drentz@partners.org
The Clinical Neuropsychologist
|September 19, 2006
Summary
This study provides cognitive test norms for highly intelligent adults (IQ ≥ 120). These reference tables aid clinicians in identifying normal cognitive aging versus early signs of dementia in this population.
Area of Science:
- Neuropsychology
- Cognitive Aging
- Dementia Research
Background:
- Establishing normative data for neuropsychological tests is crucial for accurate clinical assessment.
- Highly intelligent individuals may exhibit different cognitive aging patterns.
- Detecting early cognitive decline in high-IQ individuals is challenging due to potential cognitive reserve.
Purpose of the Study:
- To present normative data for common neuropsychological tests in a cohort of highly intelligent adults.
- To provide a benchmark for assessing cognitive performance in individuals with estimated IQs of 120 or higher.
- To assist clinicians in differentiating normal cognitive aging from incipient dementia in this specific demographic.
Main Methods:
- Neuropsychological tests were administered to 75 community-dwelling adults aged 44–86.
- Participants were screened to ensure cognitive stability over a two-year period, excluding those with incipient dementia.
- Normative data were compiled and presented in tabular format.
Main Results:
- Normative data for commonly used neuropsychological tests were generated for highly intelligent individuals.
- The data provide a reference range for cognitive performance in this population.
- Tables allow for easy comparison of individual performance against expected norms.
Conclusions:
- The presented normative data are valuable for clinicians assessing cognitive function in highly intelligent adults.
- These norms can aid in the early detection of abnormal cognitive decline, particularly in individuals at risk for dementia.
- This study contributes to a better understanding of cognitive aging in intellectually gifted individuals.
Related Concept Videos
01:29Measures of Intelligence
Psychologists measure intelligence by using standardized tests that produce a score known as the intelligence quotient or IQ. To understand IQ tests, it's important to recognize the key principles behind their construction: validity, reliability, and standardization.
Validity refers to how well a test measures what it claims to measure. An intelligence test should accurately assess intelligence rather than another characteristic, like anxiety. Criterion validity is one way to evaluate this; it...
Validity refers to how well a test measures what it claims to measure. An intelligence test should accurately assess intelligence rather than another characteristic, like anxiety. Criterion validity is one way to evaluate this; it...
01:30Biological Influences on Intelligence
Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter more...
01:29Environmental Influences on Intelligence
Despite the strong genetic influence on traits like intelligence, environmental factors significantly shape outcomes. For example, while over 90% of height variation is due to genetic differences, environmental factors such as nutrition also have a notable impact. Similarly, for intelligence, changes in a child's surroundings can significantly alter their IQ. Research shows that enriched environments boost children's academic success and help them develop key cognitive skills. Children from...
01:21The Bell Curve
The normal probability distribution, often depicted as a symmetrical, bell-shaped curve, is fundamental in statistics and the study of natural phenomena. This pattern, famously described by mathematician Carl Friedrich Gauss, shows how data points are distributed around a central mean, with most values near the average and fewer observations occurring as they deviate further from it.
This pattern applies to many human characteristics beyond intelligence, such as height. For example, if you...
This pattern applies to many human characteristics beyond intelligence, such as height. For example, if you...
01:20Multiple Intelligences Theory
Howard Gardner's theory of Multiple Intelligence proposes that there are nine distinct types of intelligence, each reflecting different ways of interacting with the world. Introduced in 1983 and expanded in subsequent years, Gardner's framework challenges the traditional notion of a single, generalized intelligence.
01:24Triarchic Theory of Intelligence
Robert Sternberg's triarchic theory of intelligence posits that intelligence is composed of three distinct but interrelated components: analytical, creative, and practical intelligence.