Single Blind Experiment: In a single blind experiment, either the participants or the researchers are unaware of who is receiving the treatment and who is receiving the control. This helps reduce bias, although it may still exist due to researcher knowledge.
Completely Randomized Design: A completely randomized design refers to an experimental design where participants are randomly assigned to different groups or treatments. This helps ensure that each participant has an equal chance of being in any group, reducing potential confounding variables.
Placebo Effect: The placebo effect occurs when a participant experiences improvements in their condition simply because they believe they are receiving treatment, even if it's actually just a placebo (inactive substance). It highlights how our beliefs and expectations can influence outcomes in experiments.