AP PSYCHOLOGY

Detailed explanation-1: -In experimental research, random assignment is a way of placing participants from your sample into different groups using randomization. With this method, every member of the sample has a known or equal chance of being placed in a control group or an experimental group.

Detailed explanation-2: -The treatment group (also called the experimental group) receives the treatment whose effect the researcher is interested in. The control group receives either no treatment, a standard treatment whose effect is already known, or a placebo (a fake treatment to control for placebo effect).

Detailed explanation-3: -Randomization is generally achieved by employing a computer program containing a random number generator. Randomization procedures differ based upon the research design of the experiment. Individuals or groups may be randomly assigned to treatment or control groups.

Detailed explanation-4: -A single-blind study is when participants do not know whether they were assigned to the control group or the treatment group. The experimenter, however does know. In a double-blind study, neither the experimenter nor the participants know to which group each participant was assigned.

Detailed explanation-5: -A representative sample is a subset of a population that seeks to accurately reflect the characteristics of the larger group. For example, a classroom of 30 students with 15 males and 15 females could generate a representative sample that might include six students: three males and three females.