Table 1.
Summary statistics of systematic review.
| Coded variable | Amount | Percent |
|---|---|---|
| Empirical approach | ||
| Quantitative | 84 | 61.3% |
| Others (e.g., theory, review) | 48 | 35% |
| Qualitative | 5 | 3.6% |
| Type of construct | ||
| Attitudes | 113 | 36.3% |
| Behaviors (perceptual) | 69 | 22.2% |
| Cognition | 53 | 17.0% |
| Emotions | 20 | 6.4% |
| Behaviors (actual) | 18 | 5.8% |
| Behaviors (theory) | 15 | 4.8% |
| Others | 13 | 4.2% |
| Traits | 10 | 3.2% |
| Role of construct | ||
| Dependent variable | 153 | 50.3% |
| Mediator variable | 71 | 23.4% |
| Independent variable | 47 | 15.5% |
| Moderator variable | 33 | 10.9% |
| Approach | ||
| Role-based approach | 76 | 91.6% |
| Process approach | 0 | 0% |
| Combination of role-based and process approach | 7 | 8.4% |
| Influence | ||
| Individual has not been influenced (or not reported) | 76 | 91.6% |
| Individual has been influenced | 7 | 8.4% |
| Shared goals | ||
| Followers have no shared goals with leader (or not reported) | 78 | 94.0% |
| It is likely that followers have shared goals with leader | 5 | 6.0% |
| Operationalization (Source of measurement) | ||
| Follower | 163 | 82.3% |
| Leader | 35 | 17.7% |
| Measurement | ||
| Scale | 166 | 83.8% |
| Experimental manipulation | 12 | 6.1% |
| Qualitative approaches | 12 | 6.1% |
| Behavioral coding | 4 | 2% |
| Other | 4 | 2% |