Controlled study of intelligence and school performance of very low-birthweight children from a defined geographical

B W Lloyd1, K Wheldall, D Perks

  • 1New Cross Hospital, Wolverhampton, West Midlands.

Insights

Very low birthweight children born in the late 1970s showed poorer intellectual outcomes and increased emotional disturbance compared to peers. Neonatal illness further impacted school performance in these vulnerable children.

Area of Science:

  • Pediatric neurology
  • Developmental psychology
  • Public health

Background:

  • Assessing long-term neurodevelopmental outcomes in preterm infants is crucial.
  • Understanding the impact of very low birthweight (VLBW) on cognitive and emotional development is essential for early intervention.

Purpose of the Study:

  • To evaluate the intellectual and emotional outcomes of VLBW children.
  • To compare the development of VLBW children with a matched control group.
  • To identify factors influencing outcomes in VLBW survivors.

Main Methods:

  • Longitudinal study of 45 VLBW children (born 1975-1978, <1501g) without major handicaps.
  • Matched control group comparison (age, sex, race, social class).
  • Assessment of intellectual outcome (IQ), school performance, and emotional disturbance.

Main Results:

  • VLBW children exhibited lower IQ scores compared to controls.
  • A higher proportion of VLBW children performed poorly or below average academically.
  • VLBW children were more prone to emotional disturbances.
  • Major neonatal illness was associated with poorer academic performance.

Conclusions:

  • VLBW survivors without major handicaps face significant neurodevelopmental challenges.
  • Neonatal health status is a critical determinant of academic success in VLBW individuals.
  • Findings may reflect outcomes for UK VLBW infants of the era, informing current clinical practice.

Related Concept Videos

Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...
Measures of Intelligence01:29

Measures 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...
Binet's Contribution to Measures of Intelligence01:23

Binet's Contribution to Measures of Intelligence

Alfred Binet, along with his student Théophile Simon, was tasked by the French Ministry of Education in 1904 to create a method for identifying students who struggled to learn through conventional classroom instruction. This initiative aimed to address overcrowding by placing such students in specialized schools. Binet and Simon developed an intelligence test comprising 30 tasks, ranging from simple commands, like touching one's nose or ear, to more complex tasks, such as drawing designs from...
Wechsler's Contribution to Measures of Intelligence01:23

Wechsler's Contribution to Measures of Intelligence

David Wechsler, a psychologist who worked with World War I veterans, developed a significant IQ test in 1939 called the Wechsler-Bellevue Intelligence Scale. This test was innovative because it combined several subtests that measured both verbal and nonverbal skills, reflecting Wechsler's belief that intelligence is a global capacity involving purposeful action, rational thinking, and effective interaction with the environment. This test later evolved into the Wechsler Adult Intelligence Scale...
Biological Influences on Intelligence01:30

Biological 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...
Environmental Influences on Intelligence01:29

Environmental 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...