| Babb [28] | Eves [29] | Johnson [30] | Laude [31] | Marciniuk [32] | Oelberg [33] | Palange [34] | Richardson [35] |
Clear focus? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Acceptable recruitment? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Sample size justified? | No | No | Yes | Yes | Yes | No | No | No |
Separate control groups? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Well-matched control groups? | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
Baseline measures or self- controls? | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
Bias minimisation for outcomes? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Accounts for confounding issues? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No |
Results allow for self- determination of sample size | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes |
Plausible results? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Score | 8 | 8 | 9 | 9 | 8 | 6 | 8 | 7 |