Research in educational psychology aims to understand how students learn and develop, improve teaching methods and curriculum, and evaluate the effectiveness of educational interventions.

A research hypothesis is a tentative statement that predicts the outcome of a study. It guides the collection and analysis of data, but it is not intended to provide a definitive answer to a research question.

Survey research is a quantitative research method that involves collecting data from a large number of participants using questionnaires or surveys.

A literature review serves multiple purposes, including identifying gaps in the existing knowledge, providing a comprehensive overview of the research topic, and evaluating the quality of previous research studies.

Informed consent, confidentiality, and protection from harm are all key ethical principles in research involving human participants.

A research design serves multiple purposes, including outlining the steps involved in conducting a research study, specifying the methods and procedures for collecting and analyzing data, and ensuring that the research study is conducted in a valid and reliable manner.

Between-subjects design, within-subjects design, and matched-pairs design are all types of experimental designs.

A control group serves multiple purposes, including providing a comparison group for the experimental group, ensuring that the results of the experiment are not due to chance, and controlling for extraneous variables that may affect the results of the experiment.

Descriptive statistics, inferential statistics, and regression analysis are all types of data analysis methods.

A research report serves multiple purposes, including communicating the findings of a research study, providing a detailed account of the research methods and procedures, and discussing the implications of the research findings.

Selection bias, confounding bias, and measurement bias are all types of research bias.

A pilot study serves multiple purposes, including testing the feasibility of a research study, identifying potential problems with the research methods and procedures, and collecting preliminary data for the main study.

Interview research, focus group research, and case study research are all types of qualitative research methods.

A meta-analysis serves multiple purposes, including combining the results of multiple studies on a similar topic, providing a more precise estimate of the effect size, and identifying factors that moderate or mediate the effect size.

An experimental design is a type of research design that involves randomly assigning participants to different groups, ensuring that the groups are equivalent in all other respects.