Social Relations Model
Designs
David A. Kenny
June 17, 2013
Round Robin Design
• The prototypical SRM design.
• Persons in groups.
• Each person is both actor and
partner with every other member
of the group.
Round Robin Design
1
1
-
2
x
3
x
4
x
5
x
6
x
2
x
-
x
x
x
x
3
x
x
-
x
x
x
4
x
x
x
-
x
x
5
x
x
x
x
-
x
6
x
x
x
x
x
-
Variants
• Indistinguishable members
–teams or groups
• Distinguishable members
–families or work teams with roles
Block Design
• People are divided into two sets.
• Person rate or interact with all of
the members of the other set.
• Can viewed as round-robin design
with specially chosen missing data.
Block Design
1
2
3
4
5
6
1
-
-
-
x
x
x
2
-
-
-
x
x
x
3
-
-
-
x
x
x
4
y
y
y
-
-
-
5
y
y
y
-
-
-
y
-
-
-
6
y
y
Symmetric Block Design:
Indistinguishable Members
1
2
3
4
5
6
1
-
-
-
x
x
x
2
-
-
-
x
x
x
3
-
-
-
x
x
x
4
x
x
x
-
-
-
5
x
x
x
-
-
-
6
x
x
x
-
-
-
Asymmetric Block Design:
Distinguishable Members
1
2
3
4
5
6
1
-
-
-
x
x
x
2
-
-
-
x
x
x
3
-
-
-
x
x
x
4
y
y
y
-
-
-
5
y
y
y
-
-
-
y
-
-
-
6
y
y
Asymmetric Block Design
Illustration: Speed Dating
• Two sets of actor and partner variances
– One for the men
– One for the women
• Reciprocities
– Actor-partner correlation for men and
women
– One dyadic reciprocity
Half Block Design:
Nonreciprocal Design
1
2
3
4
5
6
1
-
-
-
x
x
x
2
-
-
-
x
x
x
3
-
-
-
x
x
x
4
-
-
-
-
-
-
5
-
-
-
-
-
-
-
-
-
-
6
-
-
Block Round Robin
Design
1
1
-
2
y
3
y
4
x
5
x
6
x
2
y
-
y
x
x
x
3
y
y
-
x
x
x
4
w
w
w
-
z
z
5
w
w
w
z
-
z
6
w
w
w
z
z
-
Haphazard Design
• A design that is neither block or
round robin, but most actors have
multiple partners and most
partners have multiple actors.
Other Webinars
Estimation
Thank You!