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| Category | N | % | |
|---|---|---|---|
| Year of publication | |||
| 2005–2009 | 6 | 18.8 | |
| 2010–2014 | 8 | 25.0 | |
| 2015–2020 | 18 | 56.3 | |
| Type of publication | |||
| Journal | 14 | 43.8 | |
| Dissertation | 18 | 56.3 | |
| Study design | |||
| Multiple baseline | 12 | 37.5 | |
| AB | 5 | 15.6 | |
| ABA | 3 | 9.4 | |
| ABAB | 1 | 3.1 | |
| Alternating treatment | 1 | 3.1 | |
| Other | 10 | 31.3 | |
| Total | 32 | 100 | |
