g., geographical region, aspect out of MA, dimensions regarding mathematics abilities, sex, levels height, and you can guide year), i used the fresh heterogeneity decide to try. Brand new Q try (heterogeneity shot) found the distinctions among impression systems, thus to understand more about and therefore possible moderator (we.age., study keeps) may have played a task in these distinctions are required.

Geographic Part

Geographical countries had been felt a prospective modest factor. The result versions was basically grouped with the four broad communities: You, European countries, China and other counties. The latest mathematical heterogeneity among the impact items was revealed (Q = , p = 0.01). Particularly, the studies having Asian trials had the biggest impression size (roentgen = ?0.41), once the degree that have Eu examples shown the smallest impact size (r = ?0.21). (suite…)