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Sunday, January 8, 2012

Working Memory for the Star Wars fan

Some things we remember, but some things we don't.

From a list of words, people are more likely to remember the first few words ( known as the primacy effect) and the last few words (known as the recency effect) than the words in the middle. What might a 3-year-old remember from the plot of Star Wars Episode IV: A New Hope?

  • Are the primacy and recency effects evident in her account?
  • Which effects her account more (primacy or recency)?
  • Why might she remember the name of the cute droid that can't talk, but not the name of "the shiny one?"
  • Why does she recall certain events, but not others?
If you can't answer these questions because you don't remember the plot to the movie, please watch it again because, "it's an exciting movie."

Thursday, January 5, 2012

A belated Happy Holidays and some snowflake science

I had planned for this blog to end in December along with the end of the semester. However, since my loyal fans (alright so just one person - you know who you are) have insisted that I continue, I thought I would wish everyone a belated Happy Holidays and give you some seasonal science.

While we all commiserate (or celebrate) about the ridiculous winter that the upper east coast has been having, I thought it might be nice to learn about the snow that we have not been having this year.

The rainbow effect seen in this snowflake is created by the refraction of light. When light moves through the crystalized water, the angle at which the different wavelengths (colors) are traveling changes, causing us to see different colors in different places.
Snowflakes can form at as high as 37 degrees fahrenheit. A snowflake forms when water vapor sublimes directly into a solid crystal around a particle in the air. As the first crystal begins to fall it hits more water vapor, causing those molecules to freeze onto it.

The plates that form around these crystals tend to make hexagonal shapes because of the shape of water molecules (classic Mikey Mouse - looking H2O).

Different shaped flakes form in different conditions. Temperature and humidity are some variables that affect what a snowflake will look like. Slight changes in temperature might cause the water molecules to form a hexagonal plate or, possibly, to then produce branches.



Generally, more secondary branches (branches coming off of branches) or thinner branches indicates that a snowflake has formed faster. We might see these flakes when there is a higher humidity ie. lots of water vapor in the air.


Fun snowflake science and craft links:




Saturday, December 17, 2011

The Hall of Human Life: 2013 Exhibit to turn Museum of Science Visitors into Museum Scientists.




Humans are Changing
See these concept drawings in the Museum's "Then and Now" exhibit.
Have you ever wondered whether or not your metabolism is genetic? Is your gait more characteristic of your age or gender? Have you ever considered the effects of your diet or the diets of your ancestors on your body’s ability to digest milk?

Under the theme “humans are changing,” an upcoming Museum of Science exhibit, the Hall of Human Life (HHL), will encourage visitors to consider the answers to all of these questions. The exhibit will explore through these and other questions how visitors’ physical environments are affecting their bodies, how their environment itself is changing, and how they are changing their environment.

Consider, for example, how the foods you are buying today will be reflected in changes in your body tomorrow, and how, in turn those changes will affect what you will be able to buy.

Brittany Jeye, a Program Presenter at the Museum of Science explains the participatory concept behind the developing exhibit:

“You can get a wrist bracelet that scans info you provide, and tracks what you do at different activities. Then you can compare yourself to others who have done the same activity.”

This format incorporates Museum guests into the exhibit, asking them to be both a participant and a researcher in order to gain a new perspective about themselves and the human species as a whole. This perspective is much needed in light of the rapid changes that medical fields have been experiencing.

Miriam Ledley, coordinator of Cahners Computer Place, explains the importance of the dialogue surrounding HHL exploration in relation to these changes:

“Now, people are being treated at the molecular and genetic level and most don’t realize that. This exhibit will try to bridge the gap between what people know about medical treatment and how they are actually being treated.”

The Vitruvian Man
Proclaiming it’s self to be, “no ordinary exhibit about human health and biology,” the Hall of Human Life will indeed explore questions about the body, not through the abstracted biological ideal represented by da Vinci’s Vitruvian Man, but through virtual media and the data that visitors collect about themselves.

The data should prompt visitors to consider their own body in relation to that biology, as well as to changes that have since complicated that biological ideal. 


Instead of probing through models of idealized physical anatomy, they’ll be manipulating data that they participated in collecting and forming their own hypotheses about why we are the way we are.

The virtual nature of this participation gives the information collected both local and global implications. “As someone studying biology and psychology,” Jeye says, “I want to see what other people are like and how I compare or am different. Since it’s all virtual, one day we might be able to compare what we do to what people do in other parts of the world.” Should these exhibits become popularized, the database that visitors and museum experts have available to them could potentially grow to represent the global population.


Museums are Changing

Just as humans are changing, so too are museums. The Hall of Human Life is just one of many exhibits to break the Museum of Science even further out of the glass case and “Don’t Touch” philosophy that was once the rule in exhibit formatting.

Miriam Ledley, coordinator of Cahners Computer Place (CCP), another of the Museum’s exhibits, is excited by the change that the HHL represents, a change that will be seen throughout the Museum over the next few years.

“We’re trying to reshape the Museum so that it tells a story about the natural world, the designed world, and how they intersect.”

After the HHL new exhibits such as “What is Technology?” will be the next step in facilitating the telling of this story. Look out for press releases and new information about this transformation.


Contributing to the Change

Fortunately, you don’t have to wait until 2013 to begin experimenting. It is currently possible to contribute to the development of the new exhibit when you visit the Museum of Science’s Human Body Connection (HBC). The HBC is currently home to the Hall of Human Life Exhibit Laboratory, and a prototype of an upcoming HHL activity.

Here, Museum visitors explore the question, “Why do people have different abilities to balance?” Visitors may play a game in which they can move a ball through a virtual maze by shifting their weight on a footpad. Following the game, they compare the time it took them to complete the maze to the times of visitors with differing genders and ages.

A visitor attempts a balancing task being prototyped for the upcoming exhibit. 

How long would it take you? What gender or age group do you think would perform the task most quickly? Go to the Museum of Science and find out.

Monday, December 12, 2011

Fun Theory

Check out this and other "fun theory" videos. Which experiments provide the best evidence that making a behavior fun will increase the likelihood of an individual to engage in that behavior? Which experiments show that the "fun option" is just more fun?


Tuesday, December 6, 2011

Scientific American: "What Science Lovers Link to Most"

One scientist (at the request of Scientific American) tracked the successive links of viewers to 600 science web pages and found these connections between topics.
Click on the photo to read the original article and to see the full interactive web.