Homework 3 – Centrality
The objective of this homework will be to calculate centrality scores and visualize them and to calculate
centrality scores that you will export a .csv file that you could use in a statistical package such as SPSS.
For this assignment you will use the Social and Professional network data sets we created in class. For
your convenience I will go over the steps to recreate these.
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Open the spreadsheet ‘Class 2012 Whole Network’
Click on the Sheet labeled Edgelist
Highlight A1—D226 (four columns including the heading) and click Copy
Open Ucinet
Click Data->Data Editors->DL Editor
Click on the Data tab
Click the upper left cell then select Edit->Paste
On the right under Data Format select Edgearray1 (we will be loading both relational data sets
into one data set – Thanks Ryan)
Click File->Save UCINET Dataset and call it Class 2012 Whole Network
Open Netdraw (last icon at top)
Click the open folder (third icon from left) and select Class 2012 Whole Network. On the Rels
tab on the right it should have Professional checked, and Social available to be checked
Click Analysis->Centrality Measures then click OK (It should say Centrality measures calculated
and added to node attribute database)
Click Properties->Nodes->Symbols->Size->Attribute-based
Under Select attribute select Betweenness then click OK
Click file->Save Diagram As and select .jpg and save as Professional sized by Betweenness
Under the Rels tab uncheck Professional and check Social
Click the lightning bolt to redraw (10th icon from left)
Repeat steps 12-15 and save as Social sized by Betweenness
Close Netdraw and return to UCINET
Click Data->Unpack and select Class 2012 Whole Network. Under Which Relations to Unpack
select All. (This procedure will create two network data sets, one professional and one Social).
Select Transform->Symmetrize and select Professional. The Symmetrizing method will be
Maximum. Name the Output dataset Professional-Sym_Max (This will create a new dataset
symmetrized on the maximum)
Select Transform->Dichotomize
Select Professional-Sym_Max as the input dataset. The dichotomization rule should say Greater
than 0. The dataset will be named Professional-Sym_Max_GT_0. Click OK
Select Network->Centrality and Power->Freeman Betweenness->Node Betweenness and select
Professional-Sym_Max_GT_0 as the input dataset. The output dataset will be ProfessionalSym_Max_GT_0-bet
Select the spreadsheet editor with the second icon.
Click the open folder and select Professional-Sym_Max_GT_0-bet
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Highlight and copy the cells
Go back to the original spreadsheet Class 2012 Whole Network and click on the Attributes tab
Paste these cells beginning in Column F
Hit Shift->Print Screen
Open Word and Paste the image and send this to me