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Bird – Networks & Grades
19
19
weighted versus dichotomized models (intensity versus “weak ties”)
- “dichotomization”of ties means “value” of a weighted tie is reduced to “1”
Variables
Model 1
Weighted ties
Model 2
‘1’ ties
purged
‘2&3’ ties
dichotomized
Model 3
all ties
dichotomized
Model 4
Weighted ties
Model 5
‘1’ ties
purged
‘2&3’ ties
dichotomized
Model 6
all ties
dichotomized
Degree
centrality
0.263***
0.251***
0.282***
0.312***
0.286***
0.323***
N
197
(resp. only)
197
(resp. only)
197
(resp. only)
294
(entire
class)
294
(entire
class)
294
(entire
class)
R Square
0.069
0.063
0.080
0.097
0.082
0.104
F Value
14.590
13.233
16.942
31.497
26.063
33.971
Constant
1.69
1.69
1.68
2.63
2.65
2.63
* = Significant at 90%
** = Significant at 95%
*** = Significant at 99%
Model 6 demonstrates strongest r2 and best coefficient: all ties dichotomized
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