The study examined the use of tablets versus desktop computers in collaborative learning activities. Pairs of students worked on tasks using each device. Automatic metrics from session logs and qualitative analysis were used to analyze collaboration quality. Sessions with tablets showed more intense and unbalanced workspace activity compared to desktop sessions, indicating lower collaboration quality when using tablets. Students were reluctant to take advantage of tablet features and used them similar to desktops. The lack of tablet experience hindered effective collaboration compared to familiar desktops.

1. A case study: Tablets in orchestrated, collaborative activities Irene-Angelica Chounta, Nikolaos Avouris University of Patras, Greece

4. Original setting New setting Desktop-videoconferencing system with shared text editor Synergo: shared whiteboard and chat Medical decision making Computer programming (algorithm building) Intermediates; complementary prior knowledge (psychology and medicine) Beginners; similar prior knowledge CSCL tool Domain Collaborato rs Meier et al. (2007) rating scheme

5. Meier et al (2007) rating scheme dimensions

6. Kahrimanis et al. (2009) adapted collaboration rating scheme 7. Individual Task Orientation (for dyad mean or absolute difference) Motivation 6 .Cooperative Orientation Interpersonal Relationship 5 .Structuring the Problem Solving Process Coordination 4. Argumentation 3. Knowledge Exchange Joint information processing 2. Sustaining Mutual Understanding 1. Collaboration Flow Communication Dimensions Aspect of collaboration

8. 36 derived metrics used (Kahrimanis et al. 2010)

9. Quality of Collaboration Estimator (Kahrimanis et al. 2010) collaboration_quality_avg = 0.460 + 0.004* C4 - 0.005* C6 + 0.011* C8_17.5 - 0.012* C7 + 0.602* EV3 + 0.447* STC - 0.001* MW1 + 0.008* MW6 Stone & Geisser Coefficient ( cross validation) Partial Least Squares Regression Model

13. Experimental Setup(1) Time pre-defined for all stages of the activity – teacher has the opportunity to re-define the time schedule Explicitly defined task : The construction of a keystroke level model (KLM) Dyads, not changing through the study, for teams T ablets for all

15. Text input devices used Soft keyboard on a tablet Numeric keyboard on a desktop

28. thank you hci.edu.gr