Learning from Problem Solving while Observing Worked Examples
Scotty Craig, Soniya Gadgil, Kurt VanLehn, and Micki Chi
|Other Contributers||Robert N. Shelby (USNA), Brett van de Sande (Pitt)|
|Study Start Date||Sept. 1, 2006|
|Study End Date||Aug. 31, 2007|
|Number of Students||N = 64|
|Total Participant Hours||128 hrs.|
|DataShop||Target date: April 30, 2007|
This research project investigated why students learn from collaboratively observing examples. Previous laboratory research has shown that learners who watch a video of a problem solving tutoring session while collaboratively solving the same problems with a partner learn significantly more than learners that watched the video and solved the problems alone (Chi, Hausmann, & Roy, in press). In this study, the robustness of this effect was tested in the Physics learnlab. Because Chi et al. also found that videos of competent tutees caused more learning in the observers than videos of less competent tutees, this experiment include a condition where observers viewed a video of worked examples, which is the extreme case of a problem being solved by a completely competent "student."
In the experimental conditions, students collaboratively observed videos on the principles of rotational kinematics. The videos showed either a tutoring session or worked examples. The tutoring videos showed an expert human tutor helping undergraduates solve problems. The worked example video showed the expert tutor solving problems while orally describing the steps and reasoning. In the control condition, students viewed the worked-example video alone, without a collaborating peer. The same problems were shown in all videos. The Andes system was used throughtout the experiment both as the backdrop for the two sets of videos and by the students who solved Andes problems both during training and as transfer assesments. In summary, three conditions for the current study were: collaboratively observing tutoring, collaboratively observing worked examples, and individually observing worked examples.
Considerable data was lost during the experiment, reducing the power. Nonetheless, analyses have been conducted on immediate learning (Normal pretest/posttest, near transfer) and retention measures. No differences between groups were found for immediate learning. On Andes homework problems done days later (a retention and medium transfer measure), error and hint frequency was not different across conditions, but the time to complete the problems was reliabily less for the pairs observing tutoring than for the pairs observing worked examples or the solos observing worked examples. Although this suggests a mild benefit for viewing tutoring sessions rather than worked examples, replication is needed.
How is robust learning affected by collaboratively versus individually observing different types of worked examples?
The current study varied both number of observers and type of video observed. The multiple-observer variable consisted of two participants observing a video while problem solving or an individual participant watching a video while problem solving. Information presentation format was used to manipulate the example type variable. Participants watched one of two videos. They either watched an expert worked example of Andes problem solving that provided the solution steps for Andes problems along with information on why the steps where needed. Alternatively, they watched a tutoring session where a human tutor worked with a tutee to help solve the Andes problems. Since this study was conducted in the learnlab, the condition where an individual observed the tutoring session was eliminated because previous lab studies have not shown this contrast to be effective.
A dialogue hypothesis for collaboratively observing while problem solving from worked examples would be that viewing the expert tutoring session would produce more learning (normal or robust) than viewing a content equivalent condition of expert problem solving. However, an alternative (Content equivalency hypothesis) would be that since the expert tutoring session and the expert worked example both provide good learning conditions with the same content they should both produce mastery of the material (Klahr & Nigam, 2004). Process data collected in this study will help to tease out these hypotheses.
- Transfer, immediate: After exposure to the treatment, students completed three transfer problems in Andes. These problems will test the same concepts from training in new situations that require implementation of the problems in new ways.
- Normal post-test: Students were given a 12 item multiple choice pretest and posttest that taps into their ability to apply the principles of rotational kinematics to new situations. This served as a measure of immediate learning for the study.
- Homework as long-term retention and transfer items: After training, students completed their regular homework problems using Andes. Students could do them whenever they want, but most normally complete them just before the exam. The homework problems were divided based on similarity to the training problems. Homework for both similar (near transfer) and dissimilar (far transfer) problems will be analyzed.
- Accelerated future learning: The training was on Rotational kinematics, and it was followed in the course by a unit on Rotational Dynamics. Andes log files from this homework will be analyzed as a measure of acceleration of future learning.
Preliminary analyses have been conducted on immediate retention assessments (MC pretest/posttest, Andes problem solving) and long-term retention measures. An analysis of the data has yielded significant learning gains between pretest to posttest, F (1, 65) = 14.99, p <.001 with a proportional M =.56 and M = .66 respectively. No differences between groups were found for immediate retention assessments. However, data from Andes problem solving while completing homework (long-term retention measure) have showed significant differences among groups, F (1, 60) = 3.47, p <.05 in which the collaboratively observing tutoring (M = .88) pairs performed significantly better than the collaboratively observing worked examples condition (M = .75) and the individually observing worked examples condition(M = .73).
Table. “Means and standard deviations for long term retention measure of Andes problem solving”.
|Collaboratively Observing Tutoring||.88||.136|
|Collaboratively Observing worked example||.75||.258|
|Individually Observing worked example||.73||.175|
This study is part of the Interactive Communication cluster, and its hypothesis is a specialization of the IC cluster’s central hypothesis. The IC cluster’s hypothesis is that robust learning occurs when two conditions are met. Specific explanations for the current study follow.
- The learning event space should have paths that are mostly learning-by-doing along with alternative paths where a second agent does most of the work. In this study, the collaboration conditions could comprise the learning-by-doing paths where learners can work together to complete the Andes problems or the paired learners could rely on the video as their information providing agent and simply copy the steps. Alternatively the participants in the solo condition would have to rely exclusively on the video for information and thus rely on more direct copying of steps thus allowing another agent (the video) to do most of the work. In this case, both learning conditions offer the alternate copying path. However, copying could differ in frequency and be more likely to be discouraged in the collaborative condition due to the more social nature of the task.
- The student takes the learning-by-doing path unless it becomes too difficult. This study attempts to control the student’s path choice by presenting them with the tutorial dialogue that could encourage communication or an expert worked example that gives a walk through of the problem without the dialogue interaction. So, in the conditions where students are more likely to take the learning-by-doing path (the tutoring dialogue conditions), they are more likely to learn more, as compared to the conditions where they are more likely to take an alternative path (in the expert worked example conditions).
- Craig, S., Vanlehn, K., Gadgil, S., & Chi, M. (2007). Learning from Collaboratively Observing during problem solving with videos. AIED07: 13th International Conference on Artificial Intelligence in Education, Los Angeles, CA. 
- Chi, M. T. H., Hausmann, R. G. M., & Roy, M. (in press). Learning from observing tutoring collaboratively: Insights about tutoring effectiveness from vicarious learning. Cognitive Science.
- Craig, S. D., Driscoll, D., & Gholson, B. (2004). Constructing knowledge from dialog in an intelligent tutoring system: Interactive learning, vicarious learning, and pedagogical agents. Journal of Educational Multimedia and Hypermedia, 13, 163-183. 
- Gholson, B. & Craig, S. D. (2006). Promoting constructive activities that support vicarious learning during computer-based instruction. Educational Psychology Review, 18, 119-139. 
- Klahr, D. & Nigam, M. (2004). The equivalence of learning paths in early science instruction: Effects of direct instruction and discovery learning. Psychological Science, 15, 661-667.
This project shares features with the following research projects:
Collaboration during learning
- The Effects of Interaction on Robust Learning
- Collaborative Extensions to the Cognitive Tutor Algebra: A Peer Tutoring Addition
- Collaborative Extensions to the Cognitive Tutor Algebra: Scripted Collaborative Problem Solving
Worked examples and learning