;;agent-based modeling of silence spiral theory ;; turtles-own [ flockmates ;; agentset of nearby turtles social-isolation-sense personal-opinion-property expression-tendency ] patches-own [ patchmates ;; patchset of nearby patches media-opinion-atmosphere ] globals [marginal-change] to setup clear-all crt population [ set color green setxy random-xcor random-ycor ] set-default-shape turtles "person student";; ask patches ;; [ set pcolor black set media-opinion-atmosphere (random 5 ) / 10 * media-amplifier ; show media-opinion-atmosphere ] ask turtles ;;to setup-turtles turtle procedure;;;;to setup-turtles [set social-isolation-sense (random 5) / 10 * isolation-amplifier set personal-opinion-property random-normal 0 1 ;;personal opinion property,half people ,normal distribution mean 0,standard deviation 1 set expression-tendency random-normal 0 1 ; show social-isolation-sense ; show personal-opinion-property ; let moa sum [media-opinion-atmosphere] of patch-set [neighbors4] of patch-here ] end to find-flockmates ;; turtle procedure set flockmates other turtles in-radius vision end to go ask turtles [ surveillance ] tick show count turtles with [expression-tendency >= 0] do-plots end to surveillance ;; turtle procedure find-flockmates if any? flockmates [ let pop sum [personal-opinion-property] of flockmates let sis sum [social-isolation-sense ] of flockmates ;; [ show " NULL "] ; cohere ] ] let moa sum [media-opinion-atmosphere] of patch-set [neighbors4] of patch-here let et sum [expression-tendency] of flockmates set marginal-change bmoa * moa + bpop * pop + bsis * sis + bet * et set expression-tendency expression-tendency + marginal-change] if expression-tendency > 0 [ set color red] ;;count turtles with [expression-tendency > 0] end to do-plots set-current-plot "Spiral of silence" set-current-plot-pen "silence turtles" plot count turtles with [color = red] set-current-plot-pen "talking turtles" plot count turtles with [color = green] set-current-plot "Marginal Change" ;;plot-pen-reset set-current-plot-pen "marginal-change" plot marginal-change * 10000 end ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;set-current-plot "Degree Distribution (log-log)" ;; plot-pen-reset ;; erase what we plotted before ;; the way we create the network there is never a zero degree node, ;; so start plotting at degree one ;; let degree 1 ; while [degree <= max-degree] ; [ ; let matches turtles with [count link-neighbors = degree] ; if any? matches ; [ plotxy log degree 10 ; log (count matches) 10 ] ; set degree degree + 1 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;Aug 20,23:20,Wang Chengjun @ home finished the first edition of this model,which is called spiral of silence. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; @#$#@#$#@ GRAPHICS-WINDOW 456 10 973 522 19 18 13.0 1 10 1 1 1 0 1 1 1 -19 19 -18 18 0 0 1 ticks CC-WINDOW 5 536 982 631 Command Center 0 BUTTON 274 20 329 53 setup setup NIL 1 T OBSERVER NIL NIL NIL NIL BUTTON 392 21 447 54 go go T 1 T OBSERVER NIL NIL NIL NIL MONITOR 313 144 405 193 silence people count turtles with [expression-tendency >= 0] 17 1 12 SLIDER 276 106 448 139 vision vision 0 10 3 1 1 patches HORIZONTAL SLIDER 276 63 450 96 population population 0 600 300 1 1 persons HORIZONTAL PLOT 61 201 439 394 Spiral of silence time count turtles 0.0 10.0 0.0 300.0 true true PENS "silence turtles" 1.0 1 -2674135 true "talking turtles" 1.0 1 -10899396 true SLIDER 61 404 233 437 bmoa bmoa 0 0.01 0.0010 0.0001 1 NIL HORIZONTAL SLIDER 273 405 445 438 bpop bpop 0 0.01 0.0010 0.001 1 NIL HORIZONTAL SLIDER 61 444 233 477 bsis bsis 0 0.01 0.0010 0.001 1 NIL HORIZONTAL SLIDER 62 486 234 519 media-amplifier media-amplifier 1 100 10 1 1 NIL HORIZONTAL SLIDER 271 484 444 517 isolation-amplifier isolation-amplifier 1 100 10 1 1 NIL HORIZONTAL SLIDER 272 446 444 479 bet bet 0 0.01 0.0010 0.001 1 NIL HORIZONTAL BUTTON 333 20 388 53 go once go NIL 1 T OBSERVER NIL NIL NIL NIL PLOT 62 22 271 192 Marginal Change time marginal-change 0.0 10.0 0.0 10.0 true false PENS "marginal-change" 1.0 0 -13345367 true @#$#@#$#@ WHAT IS IT? ----------- This section could give a general understanding of what the model is trying to show or explain. HOW IT WORKS ------------ This section could explain what rules the agents use to create the overall behavior of the model. HOW TO USE IT ------------- This section could explain how to use the model, including a description of each of the items in the interface tab. THINGS TO NOTICE ---------------- This section could give some ideas of things for the user to notice while running the model. THINGS TO TRY ------------- This section could give some ideas of things for the user to try to do (move sliders, switches, etc.) with the model. EXTENDING THE MODEL ------------------- This section could give some ideas of things to add or change in the procedures tab to make the model more complicated, detailed, accurate, etc. NETLOGO FEATURES ---------------- This section could point out any especially interesting or unusual features of NetLogo that the model makes use of, particularly in the Procedures tab. It might also point out places where workarounds were needed because of missing features. RELATED MODELS -------------- This section could give the names of models in the NetLogo Models Library or elsewhere which are of related interest. CREDITS AND REFERENCES ---------------------- This section could contain a reference to the model's URL on the web if it has one, as well as any other necessary credits or references. @#$#@#$#@ default true 0 Polygon -7500403 true true 150 5 40 250 150 205 260 250 airplane true 0 Polygon -7500403 true true 150 0 135 15 120 60 120 105 15 165 15 195 120 180 135 240 105 270 120 285 150 270 180 285 210 270 165 240 180 180 285 195 285 165 180 105 180 60 165 15 arrow true 0 Polygon -7500403 true true 150 0 0 150 105 150 105 293 195 293 195 150 300 150 box false 0 Polygon -7500403 true true 150 285 285 225 285 75 150 135 Polygon -7500403 true true 150 135 15 75 150 15 285 75 Polygon -7500403 true true 15 75 15 225 150 285 150 135 Line -16777216 false 150 285 150 135 Line -16777216 false 150 135 15 75 Line -16777216 false 150 135 285 75 bug true 0 Circle -7500403 true true 96 182 108 Circle -7500403 true true 110 127 80 Circle -7500403 true true 110 75 80 Line -7500403 true 150 100 80 30 Line -7500403 true 150 100 220 30 butterfly true 0 Polygon -7500403 true true 150 165 209 199 225 225 225 255 195 270 165 255 150 240 Polygon -7500403 true true 150 165 89 198 75 225 75 255 105 270 135 255 150 240 Polygon -7500403 true true 139 148 100 105 55 90 25 90 10 105 10 135 25 180 40 195 85 194 139 163 Polygon -7500403 true true 162 150 200 105 245 90 275 90 290 105 290 135 275 180 260 195 215 195 162 165 Polygon -16777216 true false 150 255 135 225 120 150 135 120 150 105 165 120 180 150 165 225 Circle -16777216 true false 135 90 30 Line -16777216 false 150 105 195 60 Line -16777216 false 150 105 105 60 car false 0 Polygon -7500403 true true 300 180 279 164 261 144 240 135 226 132 213 106 203 84 185 63 159 50 135 50 75 60 0 150 0 165 0 225 300 225 300 180 Circle -16777216 true false 180 180 90 Circle -16777216 true false 30 180 90 Polygon -16777216 true false 162 80 132 78 134 135 209 135 194 105 189 96 180 89 Circle -7500403 true true 47 195 58 Circle -7500403 true true 195 195 58 circle false 0 Circle -7500403 true true 0 0 300 circle 2 false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 cow false 0 Polygon -7500403 true true 200 193 197 249 179 249 177 196 166 187 140 189 93 191 78 179 72 211 49 209 48 181 37 149 25 120 25 89 45 72 103 84 179 75 198 76 252 64 272 81 293 103 285 121 255 121 242 118 224 167 Polygon -7500403 true true 73 210 86 251 62 249 48 208 Polygon -7500403 true true 25 114 16 195 9 204 23 213 25 200 39 123 cylinder false 0 Circle -7500403 true true 0 0 300 dot false 0 Circle -7500403 true true 90 90 120 face happy false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 255 90 239 62 213 47 191 67 179 90 203 109 218 150 225 192 218 210 203 227 181 251 194 236 217 212 240 face neutral false 0 Circle -7500403 true true 8 7 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Rectangle -16777216 true false 60 195 240 225 face sad false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 168 90 184 62 210 47 232 67 244 90 220 109 205 150 198 192 205 210 220 227 242 251 229 236 206 212 183 fish false 0 Polygon -1 true false 44 131 21 87 15 86 0 120 15 150 0 180 13 214 20 212 45 166 Polygon -1 true false 135 195 119 235 95 218 76 210 46 204 60 165 Polygon -1 true false 75 45 83 77 71 103 86 114 166 78 135 60 Polygon -7500403 true true 30 136 151 77 226 81 280 119 292 146 292 160 287 170 270 195 195 210 151 212 30 166 Circle -16777216 true false 215 106 30 flag false 0 Rectangle -7500403 true true 60 15 75 300 Polygon -7500403 true true 90 150 270 90 90 30 Line -7500403 true 75 135 90 135 Line -7500403 true 75 45 90 45 flower false 0 Polygon -10899396 true false 135 120 165 165 180 210 180 240 150 300 165 300 195 240 195 195 165 135 Circle -7500403 true true 85 132 38 Circle -7500403 true true 130 147 38 Circle -7500403 true true 192 85 38 Circle -7500403 true true 85 40 38 Circle -7500403 true true 177 40 38 Circle -7500403 true true 177 132 38 Circle -7500403 true true 70 85 38 Circle -7500403 true true 130 25 38 Circle -7500403 true true 96 51 108 Circle -16777216 true false 113 68 74 Polygon -10899396 true false 189 233 219 188 249 173 279 188 234 218 Polygon -10899396 true false 180 255 150 210 105 210 75 240 135 240 ghost false 0 Polygon -7500403 true true 30 165 13 164 -2 149 0 135 -2 119 0 105 15 75 30 75 58 104 43 119 43 134 58 134 73 134 88 104 73 44 78 14 103 -1 193 -1 223 29 208 89 208 119 238 134 253 119 240 105 238 89 240 75 255 60 270 60 283 74 300 90 298 104 298 119 300 135 285 135 285 150 268 164 238 179 208 164 208 194 238 209 253 224 268 239 268 269 238 299 178 299 148 284 103 269 58 284 43 299 58 269 103 254 148 254 193 254 163 239 118 209 88 179 73 179 58 164 Line -16777216 false 189 253 215 253 Circle -16777216 true false 102 30 30 Polygon -16777216 true false 165 105 135 105 120 120 105 105 135 75 165 75 195 105 180 120 Circle -16777216 true false 160 30 30 house false 0 Rectangle -7500403 true true 45 120 255 285 Rectangle -16777216 true false 120 210 180 285 Polygon -7500403 true true 15 120 150 15 285 120 Line -16777216 false 30 120 270 120 leaf false 0 Polygon -7500403 true true 150 210 135 195 120 210 60 210 30 195 60 180 60 165 15 135 30 120 15 105 40 104 45 90 60 90 90 105 105 120 120 120 105 60 120 60 135 30 150 15 165 30 180 60 195 60 180 120 195 120 210 105 240 90 255 90 263 104 285 105 270 120 285 135 240 165 240 180 270 195 240 210 180 210 165 195 Polygon -7500403 true true 135 195 135 240 120 255 105 255 105 285 135 285 165 240 165 195 line true 0 Line -7500403 true 150 0 150 300 line half true 0 Line -7500403 true 150 0 150 150 pentagon false 0 Polygon -7500403 true true 150 15 15 120 60 285 240 285 285 120 person false 0 Circle -7500403 true true 110 5 80 Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90 Rectangle -7500403 true true 127 79 172 94 Polygon -7500403 true true 195 90 240 150 225 180 165 105 Polygon -7500403 true true 105 90 60 150 75 180 135 105 person student false 0 Polygon -13791810 true false 135 90 150 105 135 165 150 180 165 165 150 105 165 90 Polygon -7500403 true true 195 90 240 195 210 210 165 105 Circle -7500403 true true 110 5 80 Rectangle -7500403 true true 127 79 172 94 Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90 Polygon -1 true false 100 210 130 225 145 165 85 135 63 189 Polygon -13791810 true false 90 210 120 225 135 165 67 130 53 189 Polygon -1 true false 120 224 131 225 124 210 Line -16777216 false 139 168 126 225 Line -16777216 false 140 167 76 136 Polygon -7500403 true true 105 90 60 195 90 210 135 105 plant false 0 Rectangle -7500403 true true 135 90 165 300 Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285 Polygon -7500403 true true 165 255 210 210 255 195 225 255 165 285 Polygon -7500403 true true 135 180 90 135 45 120 75 180 135 210 Polygon -7500403 true true 165 180 165 210 225 180 255 120 210 135 Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135 Polygon -7500403 true true 165 105 165 135 225 105 255 45 210 60 Polygon -7500403 true true 135 90 120 45 150 15 180 45 165 90 square false 0 Rectangle -7500403 true true 30 30 270 270 square 2 false 0 Rectangle -7500403 true true 30 30 270 270 Rectangle -16777216 true false 60 60 240 240 star false 0 Polygon -7500403 true true 151 1 185 108 298 108 207 175 242 282 151 216 59 282 94 175 3 108 116 108 target false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 Circle -7500403 true true 60 60 180 Circle -16777216 true false 90 90 120 Circle -7500403 true true 120 120 60 tree false 0 Circle -7500403 true true 118 3 94 Rectangle -6459832 true false 120 195 180 300 Circle -7500403 true true 65 21 108 Circle -7500403 true true 116 41 127 Circle -7500403 true true 45 90 120 Circle -7500403 true true 104 74 152 triangle false 0 Polygon -7500403 true true 150 30 15 255 285 255 triangle 2 false 0 Polygon -7500403 true true 150 30 15 255 285 255 Polygon -16777216 true false 151 99 225 223 75 224 truck false 0 Rectangle -7500403 true true 4 45 195 187 Polygon -7500403 true true 296 193 296 150 259 134 244 104 208 104 207 194 Rectangle -1 true false 195 60 195 105 Polygon -16777216 true false 238 112 252 141 219 141 218 112 Circle -16777216 true false 234 174 42 Rectangle -7500403 true true 181 185 214 194 Circle -16777216 true false 144 174 42 Circle -16777216 true false 24 174 42 Circle -7500403 false true 24 174 42 Circle -7500403 false true 144 174 42 Circle -7500403 false true 234 174 42 turtle true 0 Polygon -10899396 true false 215 204 240 233 246 254 228 266 215 252 193 210 Polygon -10899396 true false 195 90 225 75 245 75 260 89 269 108 261 124 240 105 225 105 210 105 Polygon -10899396 true false 105 90 75 75 55 75 40 89 31 108 39 124 60 105 75 105 90 105 Polygon -10899396 true false 132 85 134 64 107 51 108 17 150 2 192 18 192 52 169 65 172 87 Polygon -10899396 true false 85 204 60 233 54 254 72 266 85 252 107 210 Polygon -7500403 true true 119 75 179 75 209 101 224 135 220 225 175 261 128 261 81 224 74 135 88 99 turtle 2 true 0 Polygon -10899396 true false 132 85 134 64 130 57 132 32 151 22 171 33 173 57 169 65 172 87 Polygon -10899396 true false 165 210 195 210 240 240 240 255 210 285 195 255 Polygon -10899396 true false 90 210 60 240 60 255 90 285 105 255 120 210 Polygon -7500403 true true 119 75 179 75 209 101 224 135 209 225 155 275 143 275 89 225 74 135 88 99 Polygon -16777216 true false 151 21 142 26 159 26 Line -16777216 false 160 35 164 51 Polygon -16777216 true false 161 38 162 46 167 45 Line -16777216 false 169 63 156 69 Line -16777216 false 134 64 144 69 Line -16777216 false 143 69 156 69 Polygon -16777216 true false 139 38 138 46 133 45 Line -16777216 false 140 35 136 51 Polygon -10899396 true false 195 90 225 75 255 75 270 90 285 120 285 150 240 105 225 105 210 105 Polygon -10899396 true false 105 90 75 75 45 75 30 90 15 120 15 150 60 105 75 105 90 105 wheel false 0 Circle -7500403 true true 3 3 294 Circle -16777216 true false 30 30 240 Line -7500403 true 150 285 150 15 Line -7500403 true 15 150 285 150 Circle -7500403 true true 120 120 60 Line -7500403 true 216 40 79 269 Line -7500403 true 40 84 269 221 Line -7500403 true 40 216 269 79 Line -7500403 true 84 40 221 269 x false 0 Polygon -7500403 true true 270 75 225 30 30 225 75 270 Polygon -7500403 true true 30 75 75 30 270 225 225 270 @#$#@#$#@ NetLogo 4.0.2 @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ default 0.0 -0.2 0 0.0 1.0 0.0 1 1.0 0.0 0.2 0 0.0 1.0 link direction true 0 Line -7500403 true 150 150 90 180 Line -7500403 true 150 150 210 180 @#$#@#$#@