Tag Archives: science

Learning and Grades

Grades + Stress +Late nights + Last minute = Learning. Is this equation healthy? Nope.

Systematic studies were performed by educational psychologists in the 1980’s and 90’s to find learning effect of grades. The results showed that grades lessen students’ interest, they make students take less intellectual risks on assignments, and they also cause students to think less intelligently.  Students in a “grade-oriented environment” are also more likely to cheat and more likely to fear failure.

 So what would a schooling system have to change in order to effectively build students?

Here are a few key things that need to be modified to make a grade-less system beneficial and actually superior to a grade-oriented system.

First is incentive: the desire for students to learn for their own sake. If grades are what encourage students to learn, then that is problematic. Students should not be motivated by rewards and punishments that will eventually make them less interested in the learning itself and more focused on the grades.

Second is accomplishment: the more students concentrate on how much they accomplish or how well they are doing, the less they are engaged with what they’re actually doing. Students become so concerned with what they achieve or accomplish that they only think about what they’re getting and not what they’re learning. So the question among educators is whether grades correctly portray student performance.

Third is quantification: there is value in assessing the quality of learning/teaching but it is not always necessary or possible to measure. Grading in a scale of point may assess a student on what they did wrong but it often misses much of what is going on and may change what is going on for the worse.

Fourth is curriculum: the goals of learning that organize your assessments. A portfolio is one solution that can be productive in the replacement of grades. They give a way to gather an array of expressive illustrations of learning for student revision.

Although research on grading and learning has slowed down since the 90’s, tests that have been performed recently show the same results. I think that this topic of research is particularly important because grades are effecting almost 100% of American youth and obviously a lot more young people around the world. If grades are harmful for learning than action should be taken. First, however, a grade-less system should be created and tested in different countries among a large variety of students. This way, scientists or researchers can check for third variables and see if the hypothesis that grades are bad for learning is without error. Another way they could potentially test this is by hiding grades from students in a grade-oriented system. Then the researchers could compare the results of the students who cannot see their grades to the students who can, and check regularly.

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nowaygirl.com

http://www.cmu.edu/teaching/assessment/howto/basics/grading-assessment.html

http://www.alfiekohn.org/teaching/tcag.htm

http://www.huffingtonpost.com/jen-rubino/grades-vs-learning_b_2525903.html

Study Shows No Serious Side Effects From HPV Vaccine

A recent study in Sweden that included close to one million girls aged 10 to 18 shoed that the vaccine for HPV (human papillomavirus) carries no serious side effects. Researchers followed the conditions of 300,000 vaccinated girls and 700,000 unvaccinated girls and compared the results approximately 180 days after the vaccinations were administered. When reexamined, the girls who were vaccinated showed no signs of increased side effects in comparisson to the unvaccinated girls. 

These findings are important because they are further evidence for the scientific integrity of the HPV vaccine. As is the case with most new vaccines, the HPV vaccine has been challenged by worrisom parents and guardians around the world; however, with the results of this new study, those doubts can be more comfortably ignored. Similar to the study that proved smoking was harmful, these researchers compared two groups: vaccinated girls and unvaccinated girls. Yet, unlike the case involving smoking, the HPV vaccine proved to be harmless. 
Other studies that involved nearly 10 years of follow-ups have indicated that the HPV vaccine is nearly 100% effective. Girls who are vaccinated display no signs of cell change related to cervical cancer– the disease that the vaccine is meant to combat. Overall, researchers are hoping that these results will lead to stronger solidarity amongst citizens, whose combined utilization of the vaccine will create a safer society. 
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Feeling Down? Turn Up the Radio!

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Everyone feels stressed, upset, or angry at point, right?! But everyone deals with their emotions differently. For me, I deal with my emotions with music. Am I alone with this one? My guess is probably not. Have you ever been down, then turned on your favorite song, and magically everything is better somehow? Well, there’s a reason behind that sudden change of emotion. According to Mrs. Emily Sohn of Discovery News, listening to music causes the release of dopamine. which is the chemical in your brain that makes you feel good. There had to be some reason why music has been around for so long, people love to feel good and be happy!

But of course, some people enjoy music more than others. Maybe instead of jamming out to your favorite band, you pick up a book and read off the stress. It’s about what works for you. Basically whatever you enjoy doing, and whatever makes you feel good, releases the dopamine chemical in your brain.
I read a fascinating article on CNN.com called This is your brain on music, which listed a few health benefits that listening to music can offer. One mind-blowing study done in the journal Trends in Cognitive Sciences proved that patients undergoing surgery who listened to music before hand, had less anxiety than those who just took drugs and didn’t listen to music. That study to me is absolutely remarkable. In this CNN article it states that Daniel Levitin and his colleagues performed 400 studies on whether or not listening to music is a physiological benefit and the answer is yes.
Of course everyone has their “go to” songs or bands they turn on when they need it most. Mine is a band called moe. Moe. has brought me from tears to laughter in the matter of seconds. I’m more passionate about them than I am about anything else really, which is shocking sometimes. I’ve been touring with this band for the past 4 years now, and I’m having the time of my life. I’ve come to know all of moe. on a more personal level within this last year and it’s truly surreal, they’re absolutely brilliant. If anyone else enjoys moe., lets be friends. We will have a lot to talk about, I can talk moe. for days! 
So if you ever wondered “Does music really make me happier”, the answer is YES! 
Now go play some tunes and release those happy chemicals! 😀

Thanks for reading! I hope you enjoyed!

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Images from Google and here.

Plan B

With reports in the media in recent months about the controversy of Plan B being available over the counter, I think it’d be interesting to look into different aspects of this drug and analyze the safety and potential controversy that lies in the issue. My research has shown that very little of the controversy has to do with science, but more with politics (of course). 

Plan B is a one pill, emergency contraceptive that is taken post-sex in order to stop pregnancy. This method is often used after other forms of birth control have failed, or if they are suspected to have failed. This pill is not an abortion pill. The pill is designed to delay or prevent ovulation and interfere with the fertilization of an egg. Time is of the ultimate importance because once the woman becomes pregnant, Plan B will not terminate the pregnancy. Fertilization of an egg can occur up to six days after sex, therefore taking Plan B after that will prove ineffective. 

The effectiveness of Plan B was studied by comparing it to a similar pill, called Yuzpe, which is similar to Plan B, but requires four pills, instead of Plan B’s one. The study of 1,955 subjects was double-blind, randomized and multinational. Researchers found that, “After a single act of intercourse occurring anytime during the menstrual cycle, the expected pregnancy rate of 8% (with no contraceptive use) was reduced to approximately 1% with Plan B.”
The effectiveness of this pill also increases the sooner it is consumed after unprotected sex. The effectiveness rate is at 95% if taken within 24 hours, but drops to 89% when taken within three days after sex. These figures still provide a hopeful outlook to curtail an unwanted pregnancy, but the sooner the better.
As for the safety of the pill among different ages, one article argues that  there is “strong scientific evidence showing that age restrictions are unnecessary.”  This article, an op-ed posted by the New York Times, was written by Cecile Richards, the president of Planned Parenthood. At first I was a little suspicious because the article seemed to have some bias, considering the source of the information, but evidence one the FDA website confirms her findings. The website reads,
Obviously the science is there for the drug to be used, without restriction by all women. As soon as politics catches up with science, more women will be better able to prevent pregnancy when all else fails.

What makes bubbles perfectly round?

Now I know, this may seem extremely insignificant in the grand scheme of inspirational scientific questions, but according to HowStuffWorks this is a scientific question in which we (yes, you too) should have an answer. 

     Behold, I have not even the slightest clue as to why bubbles are round/spherical shaped. While they aren’t perfectly shaped every try, they do look smooth as glass and glossy. Now that my curiosity is piqued, here is the reasoning behind the perfectly chiseled, yet light as air shape of the enigmatic bubble. Bubbles are composed of firmly packed layers of thin liquid that form a fancy scientific cohesion. Which basically means the molecules of the liquid are really attracted to themselves, packing tightly together. Thus, surface tension or the “cohesive molecules between liquid molecules” is formed to trap the air molecules used to blow the bubble in the first place. Comparable to balloons, the air trapped within the liquid surface tension paired with the air surrounding the bubble, mesh together to provide the enjoyable outdoor soap bubbles.
     While bubbles were particularly fun to our childhood selves, scientists can now manipulate bubble shapes to study “geometry of surfaces.” Who knew that something as playful as the soap bubble would benefit the world of science? 
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Photo courtesy of cnx.org

Unexplained bruising: you too?

I know I’m not the only person who can say this, but unfortunately I am an extremely accident-prone individual. A trip here, a bump there, or a burnt finger there – I get hurt a lot. But not only do I get hurt, I bruise ridiculously. I’ve always wondered why that is, and being that I needed another article topic, I decided to take a deeper look into why I bruise like a freshly picked peach.

     First of all: what exactly is a bruise? As written by the National Library of Medicine, a bruise is “an area of skin discoloration, occurs when small blood vessels break and leak their contents into the soft tissue beneath the skin.” Sounds complex, but we know how simple it can be to get them. Dr. Sharon Orrange, an esteemed physician and faculty at University of Southern California, cites three common ways bruising takes place. “The first being A problem with your platelets from medications.” This doesn’t apply to me, so naturally I kept reading on to number two, “A clotting problem aka coagulation disorders: coagulation factor deficiency, liver disease, vitamin K deficiency.” This seemed more appropriate as I could probably stand to eat more vitamin K enriched foods like dark greens, prunes or spices. And number three says, “A problem with blood vessels and surrounding tissue: physical abuse, vitamin C deficiency, connective tissue disease.” This doesn’t seem to apply to me either, while I’m no physician I tend to be very well balanced in my vitamin C intake.

     Dr. Orrange also identifies when to start questioning the problem of sensitive bruising. “When there are five or more bruises greater than 1 cm in diameter.” Suddenly, my self prognosis didn’t seem so important, never have I had five or more bruises on a given body part. The article I researched also said some anti-inflammatory drugs can cause non-problematic bruising. If you or anyone you know may be suffering from serious bruising, contacting a physician is suggested.

 

The information cited in this post can be found here.

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Photo courtesy of WikiHow.com

Scared $#*tless

Insidious, The Conjuring, Exorcism of Emily Rose, The Shining. Classic examples of horror films. This is an over 400 million dollar business in literally scaring their audiences out of the theaters, keeping them awake at night, and frightening them to never walk down that dark hallway alone. Why? Even after all those moments during the movie where we hide our faces or scream obscenities at the screen, we find ourselves as a community going back and purchasing tickets again and again for those off putting (yet thrilling) movies.

     It’s a well known fact that most humans seek pleasure and happiness, but that doesn’t answer why these horrifying movies can provide these pleasurable experiences. In an article by Science Daily, two dominant theories rule in science as to why this peculiarity may be. The more obvious of the two would be that the individual is actually excited for this movie, the exact opposite of petrified. Another idea is that the horrific trance throughout the movie can possibly turn into relief once the plot has concluded. If your feelings on these theories are similar to mine, then you will be grateful that Eduardo Andrade of UC, Berkeley and Joel B. Cohen of University of Florida are masterminds behind a newer study that may disprove these theories. 
     The pair conceived an idea that viewers are “happy to be unhappy.” If their ideas are correct this could spin past theories around, citing that movie-goers could possibly experience negative and positive feelings simultaneously. A sense of euphoria may overwhelm the audience as they stimulate both scared and relieving sensations. These ideals, according to Andrade and Cohen, could be applicable to thrill seeking sports or high risk activities. “When individuals who typically choose to avoid the stimuli were embedded in a protective frame of mind, such that there was sufficient psychological disengagement or detachment, they experienced positive feelings while still experiencing fearfulness,” the authors explain.
     So the next time you find yourself questioning why you are sitting in a sold-out midnight premiere of The Devil Will Find You Part II, remember that those dual sensations of relief and horror will make your stress during the movie all worth it.horrormoviegoers.jpg

Photo courtesy of news.discovery.com