TABLE 7.
Results from multiple regression analysis of first-year student attitudes toward two different aspects of scientific inquiry
| Dependent variable = posttest scores (% expert-like responses) | ||
|---|---|---|
| Factor 1: Confidence and interest | Factor 2: Understanding and acceptance | |
| Independent variables | β [95% CI]; β | β [95% CI]; β |
| Intercept | 18.33 [12.13, 24.60] | 29.14 [15.82, 42.59] |
| Currently enrolled in lab course | 14.09 [8.83, 19.48]; 0.20 | — |
| Lecture course final grade | — | 0.25 [0.08, 0.42]; 0.14 |
| ≥10 years English experience | 8.14 [2.03, 14.32]; 0.10 | 7.22 [2.37, 12.12]; 0.16 |
| Pretest score | 0.49 [0.41, 0.57]; 0.48 | 0.36 [0.24, 0.47]; 0.32 |
| Multiple R2 | 31.7% | 20.5% |
| Adjusted R2 | 31.2% | 19.9% |
| F (df1, df2) | 64.38 (3, 416) | 35.67 (3, 416) |
| p | <2.2 × 10−16 | <2.2 × 10−16 |
| n | 420a | 420a |
aExcluded 32 students due to missing responses regarding English-language experience. β = unstandardized regression coefficients; β = standardized regression coefficients. Variables were excluded (—) if they did not have a significant effect; an effect is considered significant if its 95% CI does not include zero.