Within-groups variability is reduced in the one-way within-groups ANOVA because:
A) measurement precision can be maximized when you use the dependent measure on the same participants.
B) by using the same participants across all levels of the independent variable, we have removed differences between groups due to individual variability.
C) focusing on only one variable in the study allows for reduced variability.
D) within-groups studies have lower participant drop-out rates than between-groups studies.

Question

Quizplus · Accepted Answer

By using the same participants across all conditions, individual differences that could contribute to variability are controlled for, thus reducing within-groups variability. This is because the same participants are exposed to all levels of the independent variable, minimizing the impact of their individual differences on the outcome.

Within-Groups Variability Is Reduced in the One-Way Within-Groups ANOVA Because