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Table 4 Descriptive statistics and correlations of tests on covariates

From: Developing a computer-based assessment of complex problem solving in Chemistry

Variables N Items M SD Min Max α Correlations
        1. 2. 3.
1. Domain-specific prior knowledge 22 6.53 3.18 0 18 0.73 1.00   
2. Fluid intelligence (Gf) 36 12.03 5.53 0 30 0.84 0.30** 1.00  
3. General interest (AIST) 20 43.60 16.37 0 74 0.94 0.02 ns −0.15*** 1.00
  1. Correlations were based on the sum scores. NItems, number of items; Min, Max, achieved minimum/maximum; ns, statistically insignificant (p > 0.05); α, Cronbach's alpha; Gf, general factor; AIST, Allgemeine Interessens-Struktur-Test. **p < 0.001; ***p < 0.01.