Main differences:

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Number of conditions experienced: In a between-subjects design, each participant is exposed to only one condition. In a within-subjects design, participants experience all conditions.
Sample size: Between-subjects designs generally require larger sample sizes because each participant contributes data for only one condition, whereas within-subjects designs use the same participants across conditions.
Carryover effects: Between-subject designs completely avoid carryover effects, whereas within-subject designs must account for these potential effects through balancing techniques.
Efficiency: Within-subject designs are more efficient in requiring fewer participants, but between-subject designs offer simplicity when testing a large number of conditions or treatments.
Application of between-subjects design
Between-subjects designs are widely used in various fields, each of which applies the design to test different research questions.

A. Psychology and Behavioral Sciences
In psychology experiments, between-subjects designs are often used to compare how vietnam girls number different stimuli, interventions, or treatments affect different groups. For example, researchers might compare the effects of cognitive behavioral therapy for depression with a control group that did not receive treatment.



b. Medicine and Clinical Trials
Medical research often uses a between-subjects design, especially in randomized controlled trials (RCTs). One group may receive a new drug, while another group may receive a placebo or standard treatment, allowing researchers to compare the effectiveness of the new treatment.