1. 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

2. 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”

3. 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.

4. 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

5. 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”

6. 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 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