Author (Year), Country | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | Total | Quality of research paper |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Glasser, 2006; US | + | + | - | + | - | - | + | + | + | + | + | + | - | - | - | + | + | + | - | - | 12 | Moderate |
Fleming and Spark, 2011; Australia | + | + | + | + | + | + | + | + | + | + | + | + | - | + | + | + | + | + | - | + | 18 | High |
Pearson et al., 2010; Canada | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | 20 | High |
Woodend et al., 2004; Canada | + | + | - | + | + | + | - | + | + | + | + | + | - | - | + | + | + | + | - | - | 14 | High |
Ling et al., 2018; New Zealand | + | + | + | + | + | + | - | + | u | + | + | + | - | - | + | + | + | + | - | + | 15 | High |
Daniels et al., 2007; the US | + | + | + | + | + | + | - | + | + | + | + | + | - | - | + | + | + | + | - | + | 16 | High |