**MEASURES**

**Number of High-Contact Roles**(*Network Diversity*)**Number of People in Social Network****Number of Embedded Networks**

**
Number of High-Contact Roles** (

Role Item # Scores 1 if response is … |

spouse 1 1 parent 2a not 0 child 3a not 0 child-in-law 4a not 0 close relative 5a not 0 close friend 6a not 0 church/temple member 7a not 0 student 8a not 0 employee 9a & 9b not 0 for both items neighbor 10 not 0 volunteer 11a not 0 group member 12 not 0 for # of group members talked to every 2 weeks |

**Number of People in Social Network**

__Definition__: This is the total number of people with whom
the respondent has regular contact (i.e., at least once every
2 weeks).

__Computation__: For each of the 12 possible roles, determine
the number of people with whom the respondent has regular contact.
The total number of people in the social network is computed by
summing across the 12 roles. The table below shows which
scale items are used in the computation and how each is scored.

Role Item # Scoring |

spouse 1 scores 1 if respondent is married, otherwise scores 0 parent 2a use the number indicated child 3a 1,2=1; 3=2 child-in-law 4a 1,2=1; 3=2 close relative 5a use the number indicated close friend 6a use the number indicated church/temple member 7a use the number indicated student 8a use the number indicated employee 9a & 9b sum of 9a & 9b neighbor 10 use the number indicated volunteer 11a use the number indicated group member 12 sum of number of group members talked to at least once every 2 wks |

**NOTE**: In our experience, individuals sometimes interpret the SNI item inquiring about the number of "other group" members with whom they interact at least once every 2 weeks more broadly than we intended, with some respondents reporting up to 100 or more fellow group-members. To ensure that social network size scores are not artificially inflated by individuals reporting large group memberships, we recommend recoding the variable so that all values over 6 are given a score of 7, thus keeping it consistent with all other quantitative SNI items.

**Number of Embedded Networks**

__Definition__: This measure is meant to reflect the
number of different network domains in which a respondent is active.
The maximum possible is 8. They are: family, friends, church/temple, school, work, neighbors, volunteering, and groups.
To receive a point for a domain, a respondent must have at least
4 high-contact people within that domain. The 5 family roles
are collapsed into one network for this measure. To receive
a point for family, they are required to have at least 3 high-contact
family roles as well as 4 high-contact people.

__Computation__: If the subject meets the criteria for an embedded
network, assign a score of 1 for that network, otherwise assign
a 0. The total number of embedded networks is computed by
summing the 0s and 1s. The table below shows the criteria
used for each embedded network.

Embedded Network Scores 1 if S has
at least 4 high-contact… Questionnaire Item(s) |

family family members and at least 3 high-contact family roles |

1, 2a, 3a, 4a, 5a friends friends 6a church/ temple church/temple members 7a school students/teachers 8a work work associates 9a and 9b neighbors neighbors 10 volunteering fellow volunteers 11a groups group members 12 |

Although we have found this useful in a number of exploratory
analyses, we have not published any data using number of embedded
networks.

**Reference**: Cohen S, Doyle WJ, Skoner DP, Rabin
BS, Gwaltney JM (1997). Social ties and susceptibility to
the common cold. *JAMA, 277*, 1940-4. Link to full-text (pdf)

*Version: July 23, 2014*