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📸 Levene's test in SPSS — ANOVA Options dialog
What Is Levene's Test?
Levene's test checks whether the variance of the dependent variable is equal across groups — the homogeneity of variance assumption required by ANOVA and independent samples t-test. Unlike Bartlett's test, Levene's test is robust to departures from normality, making it the preferred choice in practice.
Running Levene's Test in SPSS
📸 Levene's test output — p>.05 means variances are equal
When Assumption Is Violated
If p<.05: for t-test, report the Welch-corrected t statistic (SPSS provides automatically). For ANOVA, run Welch ANOVA: Analyze → Compare Means → One-Way ANOVA → Options → Welch.
APA Reporting
Levene's test confirmed that the homogeneity of variance assumption was met, F(2, 87)=2.34, p=.102, justifying the use of standard ANOVA.
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