Table 2 Descriptive statistics of 68 reviewed articles
From: A review of experimental evidence of how communication affects attitudes to immigration
| Â | Number of studies |
|---|---|
Method | Â |
 Conjoint experiment | 4 |
 Lab experiment | 1 |
 Natural experiment | 2 |
 Quasi-natural experiment | 2 |
 Survey experiment | 56 |
Type of attitude being tested | Â |
 Perceptions (of effects of immigration) | 34 |
 Policy preferences | 45 |
 Prejudice | 2 |
Representative populations tested | Â |
 USA | 32 |
 Europe (numerous articles test more than one country, see appendices for full list of European countries) | 69 |
 Rest of world (Australia, Canada, Israel, Japan, South Korea, Turkey) | 18 |