COMM 250 Agenda - Week 11 Housekeeping C2 – Graded & Returned to You Today TP3a – Due Today (Put in Folders w/ RAT) RP2 – Due Nov. 12 Design 2 Experiments See Web Site for Details Lecture RAT 5 Designing Experiments Review ITE 10; Complete ITE 11

Review of: In-Class Team Exercise # 10 Design a 3 x 2 Factorial Experiment (draw a Table) You Must Use These IVs: Group Size (Use 3 Levels, S, M, L, but choose the # in each) Type of Conferencing (Pick 2: Audio, Video, Text, Chat, FtF) Write out 2 Hypotheses (H1, H2): H1: One Predicting the Effect of Group Size on Group Consensus H2: One Predicting the Effect of Type of Conferencing on Group Consensus Declare the DV (You Choose – They Are in Your H1, H2) E.g., User Satisfaction, Quality of Solution, Time Efficiency Label the 2 IVs and Label Their Levels List (at least) 2 Variables you Should “Control for”

Informal Team Exercise Which is the One Best Hypothesis predicting the impact of the “type of conferencing” used? H1: The larger the group, the more often video conferencing is used. H2: When video conferencing is used, people will learn more quickly. H3: It will take longer to reach consensus using video conferencing than audio conferencing. H4: The less people use video conferencing, the less money it costs.

Informal Team Exercise Which is the Most Important Variables to control for when comparing the ability of groups to reach decisions using video conferencing vs. audio conferencing ? Outside noise Quality of connection Face to face Gender Blindness and/or deafness

In-Class Team Exercise # 11 - Part 1 First Do as Individuals, then produce a Team Version: Design a Factorial Experiment with at least 3 levels of one variable (draw a Table) Answer this question: Which is quicker to read on a web site: plain text (black letters on a white background, no links) or text supplemented in some way? Write out 2 Hypotheses (H1, H2): One Predicting Effects of IV 1, the other the Effects of IV 2 Declare the DV (It is in Your H1, H2) I’ll give you the one you MUST use: Speed of Reading Label the 2 IVs and Label Their Levels List Two “People” Variables You Should “Control for”

In-Class Team Exercise # 11 - Part 2 First Do as Individuals, then produce a Team Version: Determine the Following Statistics on the Sample of Quiz Scores Below: Mean, Median, Mode Range, Variance, S.D. Teams 1-20 Use: 10, 9, 8, 8, 8, 7, 6 Teams 21-40 Use: 12, 12, 11, 7, 6, 4, 4 (If you finish early, practice on the other set of data.) Deliverable: a written version of the above ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------