| Study | Methodological quality criteria | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Total (0–10) | |
| Babusa and Túry (2012) | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 5 |
| Babusa et al. (2012) | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 6 |
| Baile et al. (2011) | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 5 |
| Bo et al. (2014) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 3 |
| Brown et al. (2017) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 6 |
| Cafri et al. (2008) | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 5 |
| Castro López et al. (2013) | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 5 |
| De Santis et al. (2011) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 6 |
| Dryer et al. (2016) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
| Giardino and Procidano (2012): Study 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Giardino and Procidano (2012): Study 2 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Giardino and Procidano (2012): Study 3 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Giardino and Procidano (2012): Study 4 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Goodale et al. (2001) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
| Guidi et al. (2013) | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 4 |
| Hale et al. (2013) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Hildebrandt et al. (2004) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Hildebrandt et al. (2006) | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 6 |
| Hildebrandt et al (2010) | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 3 |
| Hildelbrandt et al. (2011) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Hildebrandt et al. (2012) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
| Hughes et al. (2016) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
| Jin et al. (2015) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Kanayama et al. (2006) | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 3 |
| Klimek et al. (2018) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
| Lamanna et al. (2010): Study 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
| Lamanna et al. (2010): Study 2 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
| Latorre-Román et al. (2014) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Lopez et al. (2015) | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 3 |
| Magallares (2016) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 5 |
| Maida et al. (2005) | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 4 |
| McFarland and Kaminski (2009) | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 4 |
| Mitchell, Murray, Cobley, et al. (2017) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 6 |
| Murray et al. (2012) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Murray et al. (2016) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Nieuwoudt et al. (2015) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Olivardia et al. (2000) | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 3 |
| Pope et al. (2005) | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 4 |
| Rhea et al. (2004) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Santarnecchi and Dettore (2012) | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 5 |
| Segura-García et al. (2010): Sample 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 4 |
| Segura-García et al. (2010): Sample 2 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 4 |
| Segura-García et al. (2010): Sample 3 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 4 |
| Sladek et al. (2014) | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 4 |
| Walker et al. (2009) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
Note. The methodological quality checklist consists of 10 criteria with a dichotomous response scale. The presence of the criterion is given 1 point and its absence 0 points. The total quality score for each study was obtained by summing the 1s and 0s through the 10 quality items (see Appendix A for a description of the quality items).