
Figure 1
OER Adoption Model.

Figure 2
Proportion of school types.
(‘Gymnasium’ refers to an academic secondary school allowing admission to higher education).

Table 1
Co-occurrences of school subjects.
Table 2
Constructs, items, McDonald’s ω, and scale formats.
| CONSTRUCT | ITEMS | MCDONALD’S ω | SCALE FORMAT |
|---|---|---|---|
| Cooperation and Local Sharing |
| ω = 0.77 | 1 = never; 2 = rarely; 3 = occasionally; 4 = often; 5 = very often |
| Ability to Find and Adapt |
| ω = 0.49 | 1 = strongly disagree; 2 = disagree; 3 = neither agree nor disagree; 4 = agree; 5 = strongly agree |
| Reasons for Sharing |
| ω = 0.80 | 1 = strongly disagree; … 5 = strongly agree |
| Awareness During Search |
| 1 = strongly disagree; … 5 = strongly agree | |
| Awareness of Licenses |
| 1 = strongly disagree; … 5 = strongly agree | |
| Time as a Barrier |
| 1 = strongly disagree; … 5 = strongly agree | |
| Lack of High-Quality Material |
| 1 = strongly disagree; … 5 = strongly agree | |
| Reuse of OER |
| Omega cannot be estimated because the number of items is less than three. | 1 = never; 2 = rarely; … 5 = very often |
| Creation of OER |
| Omega cannot be estimated because the number of items is less than three. | 1 = never; 2 = rarely; … 5 = very often |
Table 3
Descriptive statistics.
| SCALE | N | MIN | MAX | MEAN | SD | |
|---|---|---|---|---|---|---|
| Predictors | Cooperation and Local Sharing | 1560 | 1 | 5 | 2.85 | 0.67 |
| Ability to Find and Adapt | 1481 | 1 | 5 | 3.73 | 0.75 | |
| Reasons for Sharing | 1540 | 1 | 5 | 3.45 | 0.64 | |
| Awareness During Search | 1563 | 1 | 5 | 2.43 | 1.38 | |
| Awareness of Licenses | 1563 | 1 | 5 | 1.78 | 1.16 | |
| Time as a Barrier | 1559 | 1 | 5 | 3.67 | 1.04 | |
| Lack of High-Quality Material | 1558 | 1 | 5 | 2.62 | 1.03 | |
| Dependent Variable | Reuse of OER (only >1) | 1234 | 1.5 | 5 | 3.08 | 0.86 |
| Creation of OER (only >1) | 455 | 1.5 | 5 | 3.29 | 0.84 |
Table 4
Binary distribution of the dependent variables.
| VALUE = 1 | VALUE > 1 | PERCENTAGE VALUE = 1 | PERCENTAGE VALUE > 1 | |
|---|---|---|---|---|
| Reuse of OER | 327 | 1234 | 20.90% | 79.10% |
| Creation of OER | 1090 | 455 | 70.10% | 29.9% |
Table 5
Binary logistic regression analysis for OER reuse.
| REUSE OF OER | B | SE | WALD | df | p – VALUE | EXP(B) |
|---|---|---|---|---|---|---|
| Intercept | –0.74 | 0.64 | 1.32 | 1.00 | >0.05 | 0.48 |
| Awareness During Search | 0.33 | 0.09 | 13.50 | 1.00 | <0.05 | 1.39 |
| Awareness of Licenses | 0.41 | 0.06 | 42.13 | 1.00 | <0.05 | 1.50 |
| Time as a Barrier | 0.04 | 0.07 | 0.28 | 1.00 | >0.05 | 1.04 |
| Lack of High-Quality Material | –0.14 | 0.07 | 3.98 | 1.00 | <0.05 | 0.87 |
| Ability to Find and Adapt | 0.13 | 0.09 | 1.93 | 1.00 | >0.05 | 1.14 |
| Reasons for Sharing | 0.01 | 0.11 | 0.01 | 1.00 | >0.05 | 1.01 |
| Cooperation and Local Sharing | 0.16 | 0.11 | 1.86 | 1.00 | >0.05 | 1.17 |
Table 6
Binary logistic regression analysis for OER creation.
| CREATION OF OER | B | SE | WALD | df | p – VALUE | EXP(B) |
|---|---|---|---|---|---|---|
| Intercept | –3.469 | 0.603 | 33.082 | 1 | <0.05 | 0.031 |
| Awareness During Search | 0.444 | 0.055 | 64.155 | 1 | <0.05 | 1.559 |
| Awareness of Licenses | 0.227 | 0.049 | 21.067 | 1 | <0.05 | 1.254 |
| Time as a Barrier | –0.139 | 0.066 | 4.514 | 1 | <0.05 | 0.87 |
| Lack of High-Quality Material | 0.063 | 0.066 | 0.92 | 1 | >0.05 | 1.065 |
| Ability to Find and Adapt | –0.019 | 0.089 | 0.046 | 1 | >0.05 | 0.981 |
| Reasons for Sharing | 0.226 | 0.107 | 4.481 | 1 | <0.05 | 1.253 |
| Cooperation and Local Sharing | 0.283 | 0.101 | 7.784 | 1 | <0.05 | 1.327 |
Table 7
Multiple regression analysis for OER reuse.
| REUSE OF OER | REGRESSION COEFFICIENT | SE | BETA | T | p–VALUE |
|---|---|---|---|---|---|
| Intercept | 1.746 | 0.235 | 7.431 | p < 0.05 | |
| Awareness During Search | 0.062 | 0.02 | 0.098 | 3.104 | p < 0.05 |
| Awareness of Licenses | –0.002 | 0.023 | –0.003 | –0.109 | p > 0.05 |
| Time as a Barrier | –0.019 | 0.026 | –0.022 | –0.723 | p > 0.05 |
| Lack of High-Quality Material | –0.054 | 0.026 | –0.062 | –2.071 | p < 0.05 |
| Ability to Find and Adapt | 0.18 | 0.035 | 0.151 | 5.099 | p < 0.05 |
| Reasons for Sharing | 0.085 | 0.042 | 0.061 | 2.005 | p < 0.05 |
| Cooperation and Local Sharing | 0.144 | 0.039 | 0.113 | 3.65 | p < 0.05 |
Table 8
Multiple regression analysis for OER creation.
| CREATION OF OER | REGRESSION COEFFICIENT | SE | BETA | T | p–VALUE |
|---|---|---|---|---|---|
| Intercept | 1.242 | 0.365 | 3.404 | <0.05 | |
| Awareness During Search | –0.041 | 0.033 | –0.064 | –1.258 | >0.05 |
| Awareness of Licenses | 0.11 | 0.034 | 0.171 | 3.266 | <0.05 |
| Time as a Barrier | –0.063 | 0.04 | –0.077 | –1.575 | >0.05 |
| Lack of High-Quality Material | 0.027 | 0.043 | 0.032 | 0.637 | >0.05 |
| Ability to Find and Adapt | –0.06 | 0.056 | –0.051 | –1.071 | >0.05 |
| Reasons for Sharing | 0.051 | 0.065 | 0.039 | 0.794 | >0.05 |
| Cooperation and Local Sharing | 0.386 | 0.062 | 0.312 | 6.224 | <0.05 |
