Front: Observational Study
Back: A study where researchers observe individuals and measure variables without assigning treatments.
Front: Randomized Experiment
Back: A study where researchers impose treatments on subjects and randomly assign them to groups.
Front: Control Group
Back: A group in an experiment that does not receive the active treatment, used for comparison.
Front: Placebo Group
Back: A group that receives an inactive treatment to account for the placebo effect.
Front: Blinding
Back: A technique where participants do not know whether they are receiving the treatment or a placebo.
Front: Double Blinding
Back: A study where neither participants nor researchers know who receives the treatment.
Front: Double Dummy
Back: A method where participants receive both variants of treatment (one active, one placebo) at different times to mask which is the real treatment.
Front: Completely Randomized Design
Back: An experiment where participants are randomly assigned to treatment groups without pre-grouping.
Front: Block Design
Back: An experiment where subjects are divided into similar groups before random treatment assignment.
Front: Matched Pair Design
Back: A block design where each pair of participants receives different treatments to control for variability.