Archive for the ‘learning’ Category

Is Our Pedagogy Scientific? Friday, March 26th, 2010

Are educational institutions checking that the pedagogical practices they follow are really based on evidence-based research? Or are they just practices handed down from generation to generation or practices that look “practical and sound” as everbody with commonsense can understand?

As in every other area, fads can pop up in the educational field also. These fads, if they do work, might have undesirable “side effects” that we do not want. Or they might be pure fads with no real impact on teaching effectiveness.

According to one author, research indicates that student achievement variations depend primarily on the students themseves (50%). However, 30% of the achievement variance could be attributed to the role of teachers. Unlike conventional wisdom, it seems that the home, school, principal and peers make very little difference to student achievement.

The major factors that influence achievement include Feedback, Student’s cognitive ability, Instructional quality and Direct instruction, according the author. Three of the four fall under the role of the teacher. Even computer assisted education and individualization of teaching are ranked lower for their effect on student achievement.

However, computer-assisted education, for example, has moved much since the time of this view. What effect can modern developments like cognitive tutor can have on student achievement is to be seen. Cognitive tutors supposedly monitor how students go about their learning, and direct them towards “best practices.”

Read a blog post at Pedagogy Science.

Children Exposed to Two Languages do not Suffer Language Contamination Wednesday, March 17th, 2010

There is a common belief that if children are exposed to more than one language during early childhood, their language skills will suffer. They might have difficulty in recalling words needed in a particular language conversation, for example. A kind of language contamination is believed to occur affecting mastery of any language.

Researchers at Dartmouth College, USA, studied childen who were exposed to different combinations of languages from early childhood. They found that the children “grow as if there were two mono-linguals housed in one brain.” This apparently means that the cbildren master both languages as if these were their primary languages.

The researchers looked at 15 bilingual children exposed to two languages from varying ages. There were four groups depending on when intensive exposure to the second language began: at birth, between the ages of two to three, four to six years, and seven to nine years. The children spoke various combinations of languages, including Spanish and French, French and English, Russian and French and sign language and French.

ABC Science Online

Ritalin and Brain Performance Friday, March 12th, 2010

Doctors treat children who have difficulty in focusing on tasks with the drug Ritalin. It now turns out that Ritalin can enhance the speed of learning.

Animal studies show that Ritalin enhances the focusing ability and learning speed by increasing the activity of dopamine, a neurotransmitter deep inside the brain. Neurotransmitters are the messengers, chemical in nature, that neurons in the brain use to communicate with each other. It is the firing of neurons that underlie brain activity.

Ritalin does this by increasing brain plasticity, the ability to form new connections. Scientists had recognized that our brains remain plastic throughout our lives. Two specific types of dopamine receptors, D2 and D1, helps with focus and learning, which Ritalin affects.

With this knowledge, scientists consider that it is possible to develop better targeted drugs with fewer side effects. Such drugs can enhance our ability to focus and learn.

Read more at machineslikeus blog.

Infant Learning and Sleep Sunday, March 7th, 2010

We have all seen the heavy amounts of sleep that infants require. They seem to be always sleeping, and we say that sleep is necessary for their growth. Studies by cognitive scientists in US now confirm that the growth during sleep is not just physical but also mental.

Professors Rebecca Gomez, Richard Bootzin and Lynn Nadel of University of Arizona researched the effect of sleep on the learning of infants. They found that infants who slept after learning something was able to “abstract” the learning and apply it in unfamiliar contexts.

The researchers made up an artificial language and repeated simple phrases from that language to infants until they became familiar with these. Infants who slept after the exercise were able to create rules to apply what they learned or exhibit other evidence of abstract learning, i.e. something they have not already seen.

Infants who did not sleep during four to eight hours after the exercise can lose the entire learning, while sleep at four hour intervals helped them remember what they learned and apply it.

The researchers said that the results cannot be applied to adults, who are different from infants.

dailywildcat