Intelligence
What are the influences of environment and heredity on measured intelligence?
HEREDITY
Psychologists are greatly divided over whether heredity or environment has a more dominant influence on individual intelligence.
Although some animal studies appear to suggest heredity have the greatest influence, a seemingly more accurate conclusion may be drawn form human studies on intelligence.
In studies on the similarities between IQ of siblings reared in the same and separate environments, the IQ of fraternal twins reared together showed greater similarity than the scores of ordinary siblings.
One may wonder why this is so! Parents tend to treat twins more alike than they do ordinary siblings. The influencing factor behind the increased resemblance in the twins IQ proves to be environmental.
Identical twins who are raised together show even greater similarities in their IQ, which is to be expected, considering their identical genes and the similar environmental influences they receive. When identical twins are raised apart the similarities in their IQ can be seen to decrease, however not by much. As the similarities are still impressive one may be lead to believe that heredity plays a major role in intelligence, but one must not overlook the fact that almost all separated twins are placed in homes socially and educationally similar to those of their biological parents. This tends to falsely increase the apparent effect of genes on intelligence, by making the separa...
Hunt, E., Carlson, J. (2007). Considerations relating to the study of group differences in intelligence.
The Crusades were great military missions embarked on by the Christian nations of Europe for the purpose of rescuing the Jerusalem and the Holy Land from the hands of the Moslems. The Crusades were considered Holy Wars (1). Their main target was the Moslems not the Jews, although campaigns were also waged against pagan Slavs, Jews, Russian and Greek orthodox Christians, Mongols, Cathars, Hussites, Waldensians Old Prussians, and political enemies of the popes (2). There were many Crusades some more significant than others, but in general the Crusades was an important event in the history of Medieval Europe.
The crusades in the middle ages were a long-lasting series of vigorous wars between Christians and Muslims over the Holy Land, Jerusalem. The crusades lasted for almost two hundred years. They began in 1099 and approximately ended in 1291. (What were the motives, and causes of these gruesome wars?) is the first question one might ask. To properly answer this question, I am about to analyze the first four crusades that had began in 1099 and ended in 1212.
The stigma of matching clothes, similar thoughts, and having the same fingerprints, surround being a twin but what about the correlation of education and growth on being a twin?
“The term “nature versus nurture” is used to refer to a long-running scientific debate. The source of debate is the question of which has a greater influence on development: someone's innate characteristics provided by genetics, or someone's environment. In fact, the nature versus nurture debate has been largely termed obsolete by many researchers, because both innate characteristics and environment play a huge role in development, and they often intersect”. (Smith, 2010 p. 1)
In 1095, Pope Urban II called the first crusade. Happening between 1096 and 1099, the first crusade was both a military expedition and a mass movement of people with the simple goal of reclaiming the Holy Lands taken by the Muslims in their conquests of the Levant. The crusade ended with the capture of Jerusalem in July 1099. However, there has been much debate about whether the First Crusade can be considered an ‘armed pilgrimage’ or whether it has to be considered as a holy war. This view is complicated due to the ways in which the Crusade was presented and how the penitential nature of it changed throughout the course of the Crusade.
...ctors, not environment. Nomothetic approach suggests that this is because everyone is generally the same. Yet intelligence is poor when environment is poor - idiographic explain this as it stress social influence, but nomothetic would ignore this factor.
interpreted as being caused by genetic or environmental differences among groups? A strong promoter of the belief that there is undoubtedly a racial difference in intelligence is Phillippe Rushton. As a professor of psychology, he argues that there is irrefutable scientific evidence of difference...
Loehlin, John C., Lindzey Gardner, and J.N. Spuhler. Race Differences in Intelligence. San Francisco: W.H. Freeman and Company, 1975.
Today, realising that genes and environment cooperate and interact synergistically, traditional dichotomy of nature vs. nurture is commonly seen as a false dichotomy. Especially operant conditioning, i.e. the learning of the consequences of one's own behavior can lead to positive feedback loops between genetic predispositions and behavioral consequences that render the question as to cause and effect nonsensical. Positive feedback has the inherent tendency to exponentially amplify any initial small differences. For example, an at birth negligible difference between two brothers in a gene affecting IQ to a small percentage, may lead to one discovering a book the will spark his interest in reading, while the other never gets to see that book. One becomes an avid reader who loves intellectual challenges while the other never finds a real interest in books, but hangs out with his friends more often. Eventually, the reading brother may end up with highly different IQ scores in standardized tests, simply because the book loving brother has had more opportunities to train his brain. Had both brother received identical environmental input, their IQ scores would hardly differ.
Recent information collected showing an increase to our IQs have many asking the question, are we smarting than our ancestors? Unlike our predecessors, we live in a time that poses a greater range of cognitive problems than our ancestors encountered, and as a result we've developed new cognitive skills and the kinds of brains that can deal with these problems. So in a way we are getting smarter throughout history, though it is widely debated if this is due to our environment or genes. Since IQ tests have been standardised many times over the last one hundred years, scientists have participants take a test designed for a previous age and record the results. What (Flynn, 1994) unearthed was that new test takers score much higher than those of the older generation. Flynn and his colleagues guessed that the difference in scores was due to improving modern environments. To them IQ is part heritable and part environmental- provide a child with opportunities to learn and they're likely to have a higher IQ later in
On the ‘nature’ side of the debate is the psychometric approach, considered to be the most dominant in the study of intelligence, which “inspired the most research and attracted the most attention” (Neisser et al. 1996, p. 77). It argues that there is one general (‘g’) factor which accounts for intelligence. In the 1880s, Francis Galton conducted many tests (measuring reaction times to cognitive tasks), (Boundless 2013), in order to scientifically measure intelligence. These tests were linked to the eugenic breeding programme, which aimed to eliminate biologically inferior people from society. Galton believed that as intelligence was inherited, social class or position were significant indicators of intelligence. If an individual was of high social standing, they would be more intelligent than those of a lower position. However he failed to show any consistency across the tests for this hypothesis, weakening his theory that social class correlated with intelligence. Nevertheless, his creation of the intelligence test led many to continue to develop...
Using the different ways that putting trade in the stock exchange involves wonderful financial knowledge whereas gambling is only dictated by emotional appeal, greed or taking a shortcut in financial success. It is important to provide the details of information of the investment, such as mutual funds, mortgage lending. Also they play a role in helping the economies and the investors.
As numerous research and studies' findings have shown, both nature and nurture work together. These shouldn't be considered as separate, but instead intertwined, as they both interact and depend on each other. An interaction of genetic and environmental factors are responsible for influencing and determining intelligence levels.
Heredity Versus Environment - The Nature-nurture Controversy, Exploring Heredity And Environment: Research Methods, Beyond Heritability