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Critically review evidence of genetic and environmental influences to intelligence
Critically review evidence of genetic and environmental influences to intelligence
Discuss the genetic factors that affect intelligence essay
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Low IQ score: IQ score of 70 or below is considered a low score. For standardized tests of intelligence, the average score is fixed at 100. Over 140 is considered high or genius-level. 68% of all scores fall within minus or plus 15 points of the mean (so range 85 to 115).
So what does it mean to have a score 70 or below?
In the past, an IQ score below 70 was considered a benchmark for mental retardation, an intellectual disability characterized by significant cognitive impairments. Today, however, IQ scores alone are not used to diagnose intellectual disability. But it is criteria for a diagnosis includes an IQ below 70, evidence that these cognitive limitations existed prior to the age of 18, and limitations in two or more adaptive areas such
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In addition, certain complications during delivery may cause blood flow to be limited to the baby's brain, causing a permanently lowered IQ.
• Problems During Childhood: Lead poisoning and malnutrition have both been linked to low IQs in children.
• Illness: At any point in a person's life, certain illnesses can affect the brain and cause cognitive disabilities. Whooping cough, measles, or meningitis, if not treated properly, can lower a person's level of intelligence. In older adults, dementia can also affect intelligence.
Other Causes That May Lead to a Low IQ Score
Sometimes a person's IQ score may be lower than expected because of issues unrelated to intelligence. For example, individuals with motor skills problems, like not being able to hold and write with a pencil or grab and move blocks, may score low on an IQ test, even though they are of average or above-average intelligence. Also, people with poor communication skills will not score high on a traditional IQ test due to the large amount of talking involved with the
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But, can slipping in the bathtub really cause a drop in intelligence? The answer is not so straightforward. A single concussion generally causes no long-term negative effect. However, recent research coming out of the professional sports field, as well as from the military, is helping us understand that repeated concussions over the course of just a few years can cause cognitive impairments in both children and adults.
• Dealing with a Chronic Illness: Being really sick stinks, especially when you're a kid and you don't always understand why you can't just run around and play like everyone else. While many chronic illnesses, such as Crohn's disease, do not directly effect a person's intelligence, the stress of medical treatments and hospitalizations can repeatedly interrupt a child's regular learning environment, making it appear as though a child has lower intelligence than they really do.
• Physical Limitations: Parents and educators share joint responsibility for making sure every person testing a child is fully aware of the child's physical limitations. Children who have been diagnosed with certain visual impairments - including lazy eye - will need to have a Full Visual Evaluation conducted by a certified teacher of the visually impaired before the IQ test is administered. Children with hearing impairments or auditory processing issues will need special accommodations,
In 13 patients a significant difference between verbal and performance IQ was found. In 10 of them the performance IQ was higher than the verbal. The results of subtest analysis indicate that cognitive strengths are more visible than cognitive weaknesses.
Not only does the KBIT-2 lack in accommodating for cultural and language barriers, but it is also deficient towards those with mild to moderate motor difficulties due to the fact that the test requires minimal motor skills (Bain & Jaspers, 2010). However, since the test does not require time limits individuals with mild motor difficulties could be assessed. Overall, the Kaufman Brief Intelligence Test, Second Edition appears to be psychometrically strong and feasible assessment to administer (Bain & Jaspers, 2010).
Before answering the questions let find out what intelligence test is. It is a test consisting of a series of tasks requiring people to use various verbal and non verbal skills to measure the individual’s intellectual ability. Now that we know what an intelligence test is we can now answer the question better. Three important short comings of intelligence test that have nothing to do with intelligence are: having low motivation or high anxiety which can greatly influence the performance on the test, also IQ test may contain cultural biases in their language and or tasks that may place people of one background above people of another back ground, and members of minority groups may have little experience with this kind of test or may be uncomfortable with examiners of a different ethnic back ground than them (Comer, 2013, pp.107).
The most notable Supreme Court case regarding this issue was Atkins v. Virginia in 2002. Deryl Atkins was sentenced to lifetime imprisonment after robbing a man and shooting him eight times with his accomplice. Atkins had an IQ of 59 and the courts consider legal mental retardation below an IQ of 70. Atkins was saved from the death penalty due to this and has saved many others since. More recently, Freddie Lee Hall has been on death row for over 30 years and his case is being reconsidered because of the previously mentioned case. He has tested his IQ multiple times and ranged in between 60-80, most commonly in the low 70’s. The problem lays in that the Supreme Court gives each state the freedom to decide what IQ is justified as mentally retarded, as well as what happens to criminals that meet that standard.
It talks about many different topics this affects. For poverty, it concludes to say that people that have a low IQ most likely live in poverty as it is a strong indicator. It says that low IQ drastically increases the chance of dropping out of high school, and further decreases said person to ever achieve getting a college degree. Low IQ is also associated with people that are unemployed, injured often, or “idle” to which they describe to mean removed themselves from the workforce. It also describes that families with lower IQ have high rates of divorce, lower marriage rates, and higher illegitimate births. Plus the familes children correlates with having low birth weight babies, poor motor skills plus social development, and possible behavior problems. Another one it includes is low IQ correlates with welfare dependency, increased criminal behavior, and people with low IQ are less likely to vote and care less about
A concussion may be caused by a blow, bump, or jolt to the head or by any fall or hit that jars the brain. A concussion causes the brain to work longer and harder. A concussion affects the mental stamina and function of the brain. Even though concussions are very serious and potentially life threatening to the young athlete, studies show that less than 50% of high school athletes will report their concussions. Almost all athletes
You will see what some experts have to say about the effects of concussions and what they really are. David Camarillo, a former football player, discusses why helmets do not protect against concussions in his TedTalk. He starts off his discussion by saying “a repeated history of concussion can lead to early dementia such as Alzheimer’s.” (Camarillo, TedTalk). Mild traumatic brain injuries affect as many as 1.7 million Americans and more.
There has been a debate on whether concussions and head injuries can affect the cognitive functions such as memory. Concussions are fairly common in many sports, in the United States 300,000 sports related concussions are reported each year (Convassin, Stearne and Elbin’s, 2008). Some of the key factors, which influence concussion and cognitive functioning, are age, sex, previous concussions and high intensity activity. There are a few different studies that argue about concussion and how it can affect cognitive function such as memory. Iverson (2004) et al reported that high school athletes with a history of three or more concussions presented more symptoms and poorer memory performance on neurocognitive testing at baseline than athletes with no history of concussion (Iverson et al, 2006). In Moser’s study he found the opposite that high school athletes with a history of two or more concussions demonstrated similar cognitive performance as high school athletes who had sustained a concussion in the past week (Convassin, Stearne and Elbin’s, 2008).
" In 1982, Eysneck said "IQ correlates very highly (.8 and above, without correction for attenuation) with tests which are essentially so simple, or even directly physiological that they can hardly be considered cognitive in the accepted sense." Many other people would agree that all these skills could be put into a single category called intelligence, but there are also other people who would disagree and say that there is more than one type of intelligence.... ... middle of paper ... ...
According to the website, I have an IQ of 113. I feel as though a site like www.iqtest.com could produce a “g” score because they make you pay too see an analysis of your results, which indicates to me that they put some effort into producing fairly accurate scores. General intelligence, also known as “g”, describes an individual’s specific mental ability, which is measured by tasks on an IQ test (Myers p. 405). The site breaks down your overall IQ results into different categories of intelligence and gives you an IQ score for how well you tested in a given area. For example, there is a category for “spatial intelligence” which is ones ability to predict what actions will happen based on varied conditions (Website). By looking at the broken down results you can compare areas you have strengths in, versus the areas you might struggle in. This is in accordance to what Charles Sherman found when he discovered that people who score high in one area tend to score high in similar categories (Myers p. 405). For a person to see what their “g” score would be they would simply have to look at which category they scored highest in and from that they would see in which area they have the highest intelligence in.
The Stanford-Binet Intelligence Scale is a standardized test that assesses intelligence and cognitive abilities. Intelligence is "a concept intended to explain why some people perform better than others on cognitive tasks. Intelligence is defined as "the mental abilities needed to select, adapt to, and shape environments. It involves the abilities to profit from experience, solve problems, reason, and successfully meet challenges and achievement goals.
One of the most definitive things ever said regarding the nature of intelligence was that intelligence is whatever IQ tests measure. The IQ test has been in use throughout the 20th century and serves as an accepted measure of a person’s intelligence. It is used by institutions such as schools and the army to screen people’s level of intelligence and decisions are made based on that. The IQ test consists of a series of questions regarding certain skills such as vocabulary, mathematics, spatial relations. The scores that a person gets on these tests depend on the amount of questions that a person answers correctly. The actual score that a person gets is dependant on how others in that age group do on those particular questions.
Can intelligence be measured? Does an IQ test actually measure a person’s intelligence? Does a high score indicate a genius? Does a low score indicate stupidity or merely ignorance? These questions have been asked over and over again by psychiatrists and scientists alike, but to date there are no clear answers. These questions cannot be answered without first defining what is meant by the term intelligence. Once intelligence has been defined then it should be easy to answer these questions; however, multiple definitions of the word tend to lead to further confusion.
Intelligence has been commonly thought to decline as we get older, however this is a flawed belief. Countless individuals will argue that there are various cognitive processes that are associated with changes in the brain that do deteriorate with time, however there are also other brain areas that increase their activity in older age. I believe a person’s ability to perform certain tasks may become slower as they get older, but this doesn’t automatically mean that they are cognitively getting less intelligent. There are numerous ways in which intelligence can be defined, although it is commonly defined as general cognitive skills, this means that it is a mental ability involved in the capacity of learning, reasoning, perceiving relationships and analogies, understanding, facts, meanings, etc. (Dictionary definition). However Raymond Cattell (1963) argued that ‘intelligence does not generally consist of only cognitive performance’. Cattell and Horns theory developed in 1966 and emphasises that intelligence is composed of a number of different abilities that interrelate to form the broad term of intelligence. The main two factors are crystallised and Fluid intelligence.
“Variation in IQ is accounted for by variation in home environment to the extent of not more than 4 percent; 96 percent of the variation is accounted for by other factors” (Leahy). “Measureable environment does not shift the IQ by more than 3 to 5 points above or below the value it would have had under normal environmental conditions. The nature or hereditary component in intelligence causes greater variation than does environment.... ... middle of paper ... ...