Alpert 199016 | + | + | + | + | + | Low | 98% |
Tuckman 198637 | + | + | + | + | – | Moderate | Good according to the author |
Bluechardt 199418 | ? | ? | + | + | + | Moderate | 85% in intervention group, 100% in control group |
Herman-Tofler 199823 | – | + | – | + | + | Moderate | 100% |
MacMahon 198727 | ? | + | + | + | ? | Moderate | Not reported |
Marsh 198828 | – | + | + | + | – | Moderate | Good according to the author |
Salukon 199434 | – | + | ? | + | + | Moderate | Not reported |
Smith 198235 | – | + | + | + | – | Moderate | Good according to the author |
Smith 198436 | ? | ? | + | + | + | Moderate | Not reported |
Basile 199517 | + | ? | – | + | ? | High | Not reported |
Elstein 197721 | – | – | – | + | + | High | Not reported |
MacMahon 198815 | ? | + | + | – | ? | High | Not reported |
Munson 198831 | – | – | + | + | – | High | Not reported |
Platzer 197633 | ? | + | + | – | – | High | Good according to the author |
Boyd 199719 | – | ? | + | ? | ? | High | Not reported |
Bruya 197720 | – | ? | ? | ? | ? | High | Not reported |
Ford 198922 | ? | ? | + | ? | ? | High | Not reported |
Hilyer 197925 | ? | ? | + | ? | ? | High | Not reported |
Hilyer 198224 | – | ? | + | – | ? | High | Not reported |
Luebke 197726 | – | ? | + | ? | ? | High | Not reported |
McGowan 197429 | ? | ? | ? | ? | ? | High | Not reported |
Munson 198530 | – | – | + | ? | – | High | Not reported |
Percy 198132 | ? | ? | ? | ? | ? | High | Not reported |