Bernard and Killworth HAM Radio


This data records interaction among amatuer HAM radio calls over a one-month period. bkHamB records radio calls made over the period, as monitored by a voice-activated recording device (stored in the edge value 'ranking'). bkHamC contains rankings by the operators of how frequently they talked to other operators in the edge value 'ranking', judged retrospectively at the end of the one-month sampling period.


The Bernard and Killworth HAM radio data contains two networks of radio calls collected during a one-month period. In both networks vertices represent radio operators. The edges in the bkHamB network represent radio communications as recorded by a voice-activated device. Each edge in this network has an associated attribute 'calls' which records the number of calls made over the month period. The bkHamC network contains rankings made by radio operators at the end of the one-month collection period this results in a complete graph with edge attributes. Edge attribtues,'ranking', in the bkHamC network represent rankings made by the operators on how frequently they talked with other operators.


Bernard and Killworth, later with the help of Sailer, collected five sets of data on human interactions in bounded groups and on the actors' ability to recall those interactions. In each study they obtained measures of social interaction among all actors, and ranking data based on the subjects' memory of those interactions. The names of all cognitive (recall) matrices end in C, those of the behavioral measures in B.

Licenses and Citation

Bernard and Killworth HAM Radio Data (1976)
If the source of the data set does not specified otherwise, this data set is protected by the Creative Commons License


The data source should be cited as: Vladimir Batagelj and Andrej Mrvar (2006): Pajek datasets


The original source should be cited as:
Killworth B and Bernard H. (1976). Informant accuracy in social network data. Human Organization, 35, 269-286.
Bernard H and Killworth P. (1977). Informant accuracy in social network data II. Human Communication Research, 4, 3-18.
Killworth P and Bernard H. (1979). Informant accuracy in social network data III. Social Networks, 2, 19-46.
When publishing results obtained using this data set the original authors should be cited. In addition this package should be cited as:
Christopher L. DuBois, Emma S. Spiro, Zack Almquist, Mark S. Handcock, David Hunter, Carter T. Butts, Steven M. Goodreau, and Martina Morris. 2003 netdata: A Collection of Network Data