Medical Innovation - Adoption of New Practices in a Community of Doctors

Galesburg Physicians
Discussion Network: Who are the three or four physicians
with whom you most often find yourself discussing cases or
therapy in the course of an ordinary week?

Arrows point to doctor who was chosen/nominated as discussion partner

Network Measures

Group Size 31 Potential Ties 930 Actual Ties 80 Density 9% Isolates 1

Node 030

Geodesics... 80 paths of length 1 148 paths of length 2 172 paths of length 3 135 paths of length 4 58 paths of length 5 22 paths of length 6 6 paths of length 7 0 paths of length 8 Average Path Length 3.053

Degrees (Out) 0.100 001 0.100 002 0.100 004 0.100 005 0.100 006 0.100 007 0.100 008 0.100 009 0.100 010 0.100 012 0.100 014 0.100 018 0.100 019 0.100 020 0.100 021 0.100 022 0.100 023 0.100 024 0.100 025 0.100 026 0.100 028 0.100 029 0.100 031 0.067 013 0.067 015 0.067 016 0.067 027 0.033 003 0.033 011 0.033 017 0.000 032 0.086 AVERAGE 0.015 CENTRALIZATION

Degrees (In) 0.300 005 0.233 020 0.200 006 0.200 021 0.200 031 0.167 018 0.167 026 0.133 007 0.133 019 0.133 029 0.100 011 0.100 023 0.100 027 0.067 003 0.067 012 0.067 024 0.067 025 0.033 004 0.033 008 0.033 013 0.033 015 0.033 016 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.086 AVERAGE 0.229 CENTRALIZATION

Betweeness 0.161 021 0.123 005 0.121 006 0.120 029 0.081 023 0.074 020 0.071 031 0.070 026 0.068 007 0.047 018 0.040 019 0.026 012 0.024 013 0.023 025 0.023 027 0.022 004 0.015 008 0.011 028 0.008 024 0.007 003 0.004 011 0.004 015 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 016 0.000 017 0.000 022 0.000 032 0.037 AVERAGE 0.128 CENTRALIZATION

Network Measures Explained

Nodes with high Degrees (Out) are actively seeking others. Measure only looks at direct contacts.

Nodes with high Degrees (In) are actively sought out by others. Measure only looks at direct contacts.

Nodes with high Betweeness are key integrating nodes -- they keep the network together. Measure looks at all direct and indirect contacts.

Nodes with high Reach (Out) are reaching out to many others who are also reaching out to many others. Measure looks at all direct and indirect contacts up to path length X steps.

Nodes with high Reach (In) are sought out by many others who are also highly sought out by many others. An actor's status/prestige is a function of the status/prestige of the actors who choose the actor -- an actor's status/prestige increases more if the actor receives choices from high status/prestige actors. Measure looks at all direct and indirect contacts up to path length X steps.

Reach (Out) - 2 Steps 0.333 002 0.333 009 0.300 004 0.300 006 0.300 008 0.300 028 0.267 001 0.267 010 0.267 020 0.267 021 0.267 029 0.233 005 0.233 007 0.233 014 0.233 015 0.233 022 0.233 023 0.233 025 0.233 026 0.233 027 0.233 031 0.200 019 0.200 024 0.167 012 0.167 013 0.167 018 0.133 016 0.133 017 0.100 011 0.067 003 0.000 032 0.221 AVERAGE Reach (Out) - 3 Steps 0.567 008 0.500 028 0.467 009 0.433 010 0.433 015 0.433 029 0.400 001 0.400 002 0.400 004 0.400 005 0.400 006 0.400 020 0.367 014 0.367 021 0.367 022 0.333 019 0.333 023 0.333 025 0.333 026 0.333 027 0.333 031 0.300 007 0.300 013 0.300 017 0.267 012 0.267 018 0.267 024 0.167 003 0.167 011 0.167 016 0.000 032 0.340 AVERAGE Reach (Out) - 4 Steps 0.700 008 0.633 028 0.600 009 0.533 029 0.467 010 0.467 017 0.467 022 0.433 001 0.433 002 0.433 012 0.433 014 0.433 015 0.433 018 0.400 004 0.400 005 0.400 006 0.400 007 0.400 013 0.400 019 0.400 020 0.400 021 0.400 023 0.400 026 0.400 031 0.367 024 0.367 025 0.367 027 0.300 003 0.267 011 0.267 016 0.000 032 0.413 AVERAGE

Reach (In) - 2 Steps 0.667 005 0.667 006 0.600 020 0.600 021 0.533 007 0.400 023 0.400 026 0.333 025 0.333 027 0.300 031 0.267 018 0.267 019 0.233 029 0.200 004 0.200 011 0.200 012 0.200 024 0.167 016 0.100 003 0.067 013 0.033 008 0.033 015 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.221 AVERAGE Reach (In) - 3 Steps 0.900 006 0.867 005 0.833 007 0.833 021 0.767 023 0.733 020 0.667 026 0.600 019 0.600 025 0.600 027 0.567 031 0.533 024 0.400 004 0.267 011 0.267 016 0.267 018 0.267 029 0.233 012 0.100 003 0.100 013 0.033 008 0.033 015 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.340 AVERAGE Reach (In) - 4 Steps 0.967 005 0.967 006 0.967 007 0.900 021 0.900 023 0.867 019 0.867 020 0.867 026 0.833 024 0.800 025 0.800 027 0.733 031 0.667 004 0.267 011 0.267 012 0.267 016 0.267 018 0.267 029 0.100 003 0.100 013 0.033 008 0.033 015 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.413 AVERAGE

Data source: Knoke, D., and Burt, R. S. "Prominence" in Burt, R. S., and M. Minor, Applied Network Analysis: A Methodological Introduction, Newbury Park: Sage, 1983: 195 - 222.

Copyright © 1999, Valdis Krebs.
Permission to use in educational institutions granted by Author.

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Group Size 31 Potential Ties 930 Actual Ties 80 Density 9% Isolates 1 Node 030	Geodesics... 80 paths of length 1 148 paths of length 2 172 paths of length 3 135 paths of length 4 58 paths of length 5 22 paths of length 6 6 paths of length 7 0 paths of length 8 Average Path Length 3.053
Degrees (Out) 0.100 001 0.100 002 0.100 004 0.100 005 0.100 006 0.100 007 0.100 008 0.100 009 0.100 010 0.100 012 0.100 014 0.100 018 0.100 019 0.100 020 0.100 021 0.100 022 0.100 023 0.100 024 0.100 025 0.100 026 0.100 028 0.100 029 0.100 031 0.067 013 0.067 015 0.067 016 0.067 027 0.033 003 0.033 011 0.033 017 0.000 032 0.086 AVERAGE 0.015 CENTRALIZATION	Degrees (In) 0.300 005 0.233 020 0.200 006 0.200 021 0.200 031 0.167 018 0.167 026 0.133 007 0.133 019 0.133 029 0.100 011 0.100 023 0.100 027 0.067 003 0.067 012 0.067 024 0.067 025 0.033 004 0.033 008 0.033 013 0.033 015 0.033 016 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.086 AVERAGE 0.229 CENTRALIZATION
Betweeness 0.161 021 0.123 005 0.121 006 0.120 029 0.081 023 0.074 020 0.071 031 0.070 026 0.068 007 0.047 018 0.040 019 0.026 012 0.024 013 0.023 025 0.023 027 0.022 004 0.015 008 0.011 028 0.008 024 0.007 003 0.004 011 0.004 015 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 016 0.000 017 0.000 022 0.000 032 0.037 AVERAGE 0.128 CENTRALIZATION	Network Measures Explained Nodes with high Degrees (Out) are actively seeking others. Measure only looks at direct contacts. Nodes with high Degrees (In) are actively sought out by others. Measure only looks at direct contacts. Nodes with high Betweeness are key integrating nodes -- they keep the network together. Measure looks at all direct and indirect contacts. Nodes with high Reach (Out) are reaching out to many others who are also reaching out to many others. Measure looks at all direct and indirect contacts up to path length X steps. Nodes with high Reach (In) are sought out by many others who are also highly sought out by many others. An actor's status/prestige is a function of the status/prestige of the actors who choose the actor -- an actor's status/prestige increases more if the actor receives choices from high status/prestige actors. Measure looks at all direct and indirect contacts up to path length X steps.
Reach (Out) - 2 Steps 0.333 002 0.333 009 0.300 004 0.300 006 0.300 008 0.300 028 0.267 001 0.267 010 0.267 020 0.267 021 0.267 029 0.233 005 0.233 007 0.233 014 0.233 015 0.233 022 0.233 023 0.233 025 0.233 026 0.233 027 0.233 031 0.200 019 0.200 024 0.167 012 0.167 013 0.167 018 0.133 016 0.133 017 0.100 011 0.067 003 0.000 032 0.221 AVERAGE Reach (Out) - 3 Steps 0.567 008 0.500 028 0.467 009 0.433 010 0.433 015 0.433 029 0.400 001 0.400 002 0.400 004 0.400 005 0.400 006 0.400 020 0.367 014 0.367 021 0.367 022 0.333 019 0.333 023 0.333 025 0.333 026 0.333 027 0.333 031 0.300 007 0.300 013 0.300 017 0.267 012 0.267 018 0.267 024 0.167 003 0.167 011 0.167 016 0.000 032 0.340 AVERAGE Reach (Out) - 4 Steps 0.700 008 0.633 028 0.600 009 0.533 029 0.467 010 0.467 017 0.467 022 0.433 001 0.433 002 0.433 012 0.433 014 0.433 015 0.433 018 0.400 004 0.400 005 0.400 006 0.400 007 0.400 013 0.400 019 0.400 020 0.400 021 0.400 023 0.400 026 0.400 031 0.367 024 0.367 025 0.367 027 0.300 003 0.267 011 0.267 016 0.000 032 0.413 AVERAGE	Reach (In) - 2 Steps 0.667 005 0.667 006 0.600 020 0.600 021 0.533 007 0.400 023 0.400 026 0.333 025 0.333 027 0.300 031 0.267 018 0.267 019 0.233 029 0.200 004 0.200 011 0.200 012 0.200 024 0.167 016 0.100 003 0.067 013 0.033 008 0.033 015 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.221 AVERAGE Reach (In) - 3 Steps 0.900 006 0.867 005 0.833 007 0.833 021 0.767 023 0.733 020 0.667 026 0.600 019 0.600 025 0.600 027 0.567 031 0.533 024 0.400 004 0.267 011 0.267 016 0.267 018 0.267 029 0.233 012 0.100 003 0.100 013 0.033 008 0.033 015 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.340 AVERAGE Reach (In) - 4 Steps 0.967 005 0.967 006 0.967 007 0.900 021 0.900 023 0.867 019 0.867 020 0.867 026 0.833 024 0.800 025 0.800 027 0.733 031 0.667 004 0.267 011 0.267 012 0.267 016 0.267 018 0.267 029 0.100 003 0.100 013 0.033 008 0.033 015 0.033 028 0.033 032 0.000 001 0.000 002 0.000 009 0.000 010 0.000 014 0.000 017 0.000 022 0.413 AVERAGE
Data source: Knoke, D., and Burt, R. S. "Prominence" in Burt, R. S., and M. Minor, Applied Network Analysis: A Methodological Introduction, Newbury Park: Sage, 1983: 195 - 222. Copyright © 1999, Valdis Krebs. Permission to use in educational institutions granted by Author. Home \| Contact