Answer:
empirical articles; meta-analysis; effect size
Step-by-step explanation:
Empirical research article: This is an article that describes the results of the research based on experiments or actual observations. This is an example of primary research.
Meta-Analysis: It refers to an experiment or research where the researchers inspect the results of a few previous studies, instead of doing new research with the subjects or the participants. This is a statistical procedure for merging data from various studies.
Effect size: This is a quantitative estimate of the immensity of the experimenter effect. Effect size is directly proportional to the relationship between two variables.