Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Students Who Use "Clickers" Score Better on Physics Tests

18.07.2008
Hand-held electronic devices called clickers are helping college students learn physics, according to a series of research studies.

Ohio State University students who used the devices to answer multiple-choice questions during physics lectures earned final examination scores that were around 10 percent higher – the equivalent of a full-letter grade -- than students who didn't.

The clickers also appear to level the playing field between male and female students. In clicker classes, male and female students performed equally well. In the traditional, non-clicker classes, male students outperformed female students.

To Bill Reay, professor of physics at Ohio State, these results suggest that clickers could potentially encourage more women to pursue STEM (Science, Technology, Engineering and Mathematics) disciplines.

"The U.S. industrial sector has expressed an urgent need for more scientists and engineers to enter the workforce, to maintain our technological edge in the future," Reay said. "We need to recruit more students -- male and female -- who otherwise might not study science. And it turns out that for women especially, clickers can be a valuable learning tool."

The Ohio State researchers reported their early results in the American Journal of Physics earlier this year. Additional results appeared in the June 2008 issue of the journal Physical Review Special Topics - Physics Education Research.

Around the country, clickers are regularly used to maintain student attention in large lecture halls. At large universities such as Ohio State, even relatively advanced science classes may contain hundreds of students. Reay said that clickers are a good way to help students pay attention and learn in today's classroom.

"A hundred years ago, not so many people went to college, and classes were smaller. It was easier to engage students in learning," Reay said. "Now we have a class with 700 students in it. And the question is, how do you engage 700 kids? Well, clickers can do it."

In clicker classes, multiple choice questions appear on a large computer screen at the front of the lecture hall. Students hold the wireless devices, which resemble small calculators. They cast their votes for the correct answer based on their understanding of the part of the lecture that was just given. A bar graph shows the percentage of students voting for each answer.

Physics educators have expanded the use of clickers at Ohio State by developing sequences of questions to determine if students really understand the underlying concepts of a lecture. The technique involves offering a series of questions -- typically three -- each with different wording and structure, but all designed to test the same concept.

One three-question sequence that Reay and his colleagues developed is used to test students' understanding of Faraday's Law. The class is shown a diagram of two wire loops of different sizes moving into a magnetic field, and asked which loop will experience larger induced voltage at the moment it enters the field.

For an introductory electromagnetics class of engineering majors, this is an easy question and Reay would expect more than 80 percent to answer it correctly.

"But not all students choose the correct answer for the right reason," he said. "A common misconception is that larger loops always have a larger induced voltage, which is not the case. That's why we then ask two more questions that involve loops of different sizes and shapes. The question-sequence method eliminates common student misconceptions, and helps students grasp the underlying concept in a short time."

The idea with clickers, Reay explained, is that both lecturers and students can gauge whether students understand the material in real time. If students don't understand something, the lecturer might try to get them to think about the topic in a different way, perhaps by discussing it amongst themselves to encourage understanding before moving on to a new topic.

Professors typically devote approximately 20 percent of a class to clicker questions, and the rest to traditional lecture and discussion. "Clicker questions are like icing on a cake," Reay said. "Icing complements the flavor, but you need both for a tasty cake."

Students aren't required to use the clickers, but Reay said that participation over the years has held relatively constant at 90 percent. Small incentives, such as grading clicker questions or offering extra credit, can raise participation to 98 percent.

Students seem to like the clickers.

“When we conduct our quarterly surveys, we find that the percentage of students enthusiastically favoring use of clickers is higher than 90 percent,” Reay said.

"In addition to this popularity, our research indicates that our sequence method of using clickers offers students a significant advantage on learning, and we are working to sharpen our methodology for measuring these learning gains. We're finding that the timing of pretests and post tests during the quarter matters, along with different applications of incentives,” he added.

During the 2006-2007 academic year, the clicker classes outperformed the non-clicker classes by an average of 10 percent -- a full letter grade -- on the multiple choice part of their final exams. The non-clicker class averaged a score of 61 percent on this section; the clicker class averaged 72 percent.

In addition to normal testing, the physics educators gave each class a concept pretest before the quarter started, and a related post-test after the quarter was over. Then they calculated the classes' average "score gain" -- a measure of how much higher the post-test scores were compared to the pre-tests.

Both sexes had nearly equal gains in the clicker classes: females had a score gain of 6.2, and males a score gain of 6.7. In the non-clicker classes, the female score gain was 4.3, and the male score gain was 6.6.

As to why clickers seem to help female students more than male students, the anonymity of the devices may offer an advantage. In surveys, nearly all the students -- male and female -- said they liked having the ability to keep their answers private. Students can easily hold the clicker in one hand and block their neighbor’s view. “We suspect that anonymity is a benefit, but right now that is really just speculation," Reay said.

In related work, Ohio State is collaborating with Chicago State University to test the effectiveness of clickers with their predominately minority student population. The Ohio State clicker questions are also being used at the College of DuPage and Wright State University.

Reay also thinks that clickers may be useful for high school classes, and his group is starting a research program with the Metro High School of Columbus, a local science and technology high school. "This research effort fits with a State of Ohio initiative to provide a seamless student transition from high school to state universities," he said.

Ultimately, the Ohio State approach could change the way classrooms use clickers -- and even change the design of clickers themselves. The physics educators are working with an Ohio clicker manufacturer, Turning Technologies, in developing a new generation of devices that will measure the student’s ability to solve word and number problems rather than just multiple choice.

Among the achievements Reay is most proud of is the package of 450 sequenced clicker questions compiled with his colleagues. This package will be made available nationally to faculty teaching freshman physics, via web sites and professional meetings. Starting in 2009 they will be the first research-based clicker materials ever offered with a textbook by publisher John Wiley and Sons, Inc.

Reay’s team includes Lei Bao, associate professor of physics and director of the Ohio State Physics Education Research Group; Lin Ding, a postdoctoral researcher; Albert Lee, a doctoral student; and Pengfei Li, a former doctoral student who is now a faculty member at Savannah State University. They have collaborators at Chicago State University, the College of DuPage, Metro High School of Columbus and Wright State University.

This research was funded by the National Science Foundation and the Ohio State University.

Contact: Neville W. Reay, (614) 292-6956; Reay.1@osu.edu

Pam Frost Gorder | Newswise Science News
Further information:
http://www.osu.edu

More articles from Studies and Analyses:

nachricht Multi-year study finds 'hotspots' of ammonia over world's major agricultural areas
17.03.2017 | University of Maryland

nachricht Diabetes Drug May Improve Bone Fat-induced Defects of Fracture Healing
17.03.2017 | Deutsches Institut für Ernährungsforschung Potsdam-Rehbrücke

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>