“…This scale offers 5 response options ranging from 1 (totally disagree) to 5 (totally agree) and comprises 33 items (29 direct and 4 inverse) grouped into nine subscales: physical safety (e.g., "At my school there are students who get into fights"); rules (e.g., "My school has clear rules"); student-teacher relationships (e.g., "At my school there are teachers whom I can talk to about any problems I may be having"); peer relationships (e.g., "I feel comfortable talking to my classmates about my problems"); group cohesion (e.g., "Everyone in my class helps and looks after each other"); environmental-structural aspects (e.g., "My classroom is well lit"); teachers' ability to motivate (e.g., "Our teachers manage to get us interested in classwork"); teachers' expectations (e.g., "Our teachers expect us to work hard"); and methodological resources (e.g., "I think the materials we use in class are interesting"). The confirmatory factor analysis carried out on this instrument reveals that the underlying factor structure is the one of nine correlated factors [25]. In the present study, the nine subscales had adequate internal consistency reliability coefficients: physical safety (α = 0.832, ω = 0.833, ρ = 0.838), rules (α = 0.833, ω = 0.828, ρ = 0.829), student-teacher relationships (α = 0.828, ω = 0.818, ρ = 0.819), peer relationships (α = 0.864, ω = 0.865, ρ = 0.865), group cohesion (α = 0.853, ω = 0.853, ρ = 0.854), environmental-structural aspects (α = 0.701, ω = 0.698, ρ = 0.720), teachers' ability to motivate (α = 0.913, ω = 0.908, ρ = 0.908), teachers' expectations (α = 0.790, ω = 0.798, ρ = 0.806) and methodological resources (α = 0.802, ω = 0.806, ρ = 0.808).…”