Multilevel mixed-effects regression results
| Variable | Null model | Model 1† DV: Idea appreciation | Model 2° DV: Idea survival | Model 3° DV: Idea survival | Model 4† DV: Idea appreciation |
|---|---|---|---|---|---|
| Ideas (level 1) | |||||
| Intercept | 0.800*** (0.017) | −3.921*** (1.210) | −14.185** (6.584) | −11.282* (6.075) | −3.698*** (1.149) |
| Idea attention | 0.294*** [1.34] (0.050) | 0.701** [2.01] (0.282) | −0.139 [1.14] (0.352) | 0.303*** [1.35] (0.048) | |
| Idea appreciation | 1.810*** [6.11] (0.509) | ||||
| #Negative comments | −2.162*** [0.11] (0.715) | −1.077 [0.34] (0.700) | |||
| Average length of comments (ln) | 0.192 [1.21] (0.108) | 0.780 [2.18] (0.564) | 0.909 [2.48] (0.621) | 0.150 [1.16] (0.104) | |
| Idea description length (ln) | 0.058 [1.06] (0.141) | 0.384 [1.47] (0.645) | −0.056 [0.94] (0.627) | 0.040 [1.04] (0.136) | |
| Attachments | −0.374* [0.69] (0.205) | −0.599 [0.55] (1.631) | 0.300 [1.35] (1.575) | −0.401** [0.67] (0.201) | |
| Ideators' self-comments | −0.408*** [0.66] (0.142) | −0.622 [0.54] (0.784) | 0.624 [1.87] (0.896) | −0.480*** [0.62] (0.137) | |
| Time lag since session beginning | 0.079 [1.08] (0.094) | −0.534* [0.59] (0.303) | −0.714** [0.49] (0.344) | 0.050 [1.05] (0.091) | |
| Time lag since previous idea | 0.006**[1.01] (0.003) | 0.040** [1.04] (0.019) | 0.037* [1.04] (0.021) | 0.005* [1.00] (0.003) | |
| Competition for attention (αj) | −0.008 [0.99] (0.022) | −0.103 [0.90] (0.137) | −0.160 [0.85] (0.163) | −0.065* [1.07] (0.034) | |
| Idea attention × Competition for attention(αj) | −0.004*** [0.99] (0.002) | ||||
| Individuals (level 2) | |||||
| Gender | 0.050 [1.03] (0.260) | 1.633 [5.12] (1.642) | 2.427 [11.33] (1.874) | −0.013 [0.99] (0.245) | |
| Manager | 0.031 [1.12] (0.184) | 0.208 [1.23] (0.888) | 0.363 [1.44] (0.882) | 0.119 [1.13] (0.176) | |
| Ideators' activity (ln) | 0.114 [1.05] (0.093) | 1.349** [3.85] (0.583) | 1.234** [3.43] (0.564) | −0.103 [1.11] (0.088) | |
| Additional information | |||||
| Random intercept (σ2) | 0.010 (0.004) | 0.236 (0.109) | 3.980 (3.303) | 2.299 (2.494) | 0.153 (0.101) |
| ICC | 0.13 | ||||
| −2 log likelihood (FIML) | 99.238 | 573.366 | 114.664 | 90.726 | 566.468 |
| Wald χ2 | – | 95.19*** | 15.64 | 16.75 | 107.16*** |
| Variable | Null model | Model 1† DV: Idea appreciation | Model 2° DV: Idea survival | Model 3° DV: Idea survival | Model 4† DV: Idea appreciation |
|---|---|---|---|---|---|
| Intercept | 0.800*** (0.017) | −3.921*** (1.210) | −14.185** (6.584) | −11.282* (6.075) | −3.698*** (1.149) |
| Idea attention | 0.294*** [1.34] (0.050) | 0.701** [2.01] (0.282) | −0.139 [1.14] (0.352) | 0.303*** [1.35] (0.048) | |
| Idea appreciation | 1.810*** [6.11] (0.509) | ||||
| #Negative comments | −2.162*** [0.11] (0.715) | −1.077 [0.34] (0.700) | |||
| Average length of comments (ln) | 0.192 [1.21] (0.108) | 0.780 [2.18] (0.564) | 0.909 [2.48] (0.621) | 0.150 [1.16] (0.104) | |
| Idea description length (ln) | 0.058 [1.06] (0.141) | 0.384 [1.47] (0.645) | −0.056 [0.94] (0.627) | 0.040 [1.04] (0.136) | |
| Attachments | −0.374* [0.69] (0.205) | −0.599 [0.55] (1.631) | 0.300 [1.35] (1.575) | −0.401** [0.67] (0.201) | |
| Ideators' self-comments | −0.408*** [0.66] (0.142) | −0.622 [0.54] (0.784) | 0.624 [1.87] (0.896) | −0.480*** [0.62] (0.137) | |
| Time lag since session beginning | 0.079 [1.08] (0.094) | −0.534* [0.59] (0.303) | −0.714** [0.49] (0.344) | 0.050 [1.05] (0.091) | |
| Time lag since previous idea | 0.006**[1.01] (0.003) | 0.040** [1.04] (0.019) | 0.037* [1.04] (0.021) | 0.005* [1.00] (0.003) | |
| Competition for attention ( | −0.008 [0.99] (0.022) | −0.103 [0.90] (0.137) | −0.160 [0.85] (0.163) | −0.065* [1.07] (0.034) | |
| Idea attention × Competition for attention( | −0.004*** [0.99] (0.002) | ||||
| Gender | 0.050 [1.03] (0.260) | 1.633 [5.12] (1.642) | 2.427 [11.33] (1.874) | −0.013 [0.99] (0.245) | |
| Manager | 0.031 [1.12] (0.184) | 0.208 [1.23] (0.888) | 0.363 [1.44] (0.882) | 0.119 [1.13] (0.176) | |
| Ideators' activity (ln) | 0.114 [1.05] (0.093) | 1.349** [3.85] (0.583) | 1.234** [3.43] (0.564) | −0.103 [1.11] (0.088) | |
| Random intercept ( | 0.010 (0.004) | 0.236 (0.109) | 3.980 (3.303) | 2.299 (2.494) | 0.153 (0.101) |
| ICC | 0.13 | ||||
| −2 log likelihood (FIML) | 99.238 | 573.366 | 114.664 | 90.726 | 566.468 |
| Wald | – | 95.19*** | 15.64 | 16.75 | 107.16*** |
Note(s): †Multilevel Mixed-effects Poisson regression; °Multilevel Mixed-effects Logistic regression; N (ideas) = 280; n (individuals) = 137. Standard errors in parentheses. IRR and OR in square brackets; *p < 0.10; **p < 0.05; ***p < 0.01. FIML = Full Information Maximum Likelihood