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REACH Dictionary
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Sample size refers to the number of observations collected in a research study. In family research, these observations are most often individual participants in the study, from whom the researchers collect data to answer a research question.

Category: Data analyses

A narrative review of literature is a verbal summary and analysis of several pre-existing studies, usually centered on a specific theme and context.

Citation: Cramm, H., Norris, D., Venedam, S., & Tam-Seto, L. (2018). Toward a model of military family resiliency: A narrative review. Journal of Family Theory Review, 10(3), 620-640. https://doi.org/10.1111/jftr.12284 Maruyama, G. and Ryan, C. S. (2014) Research Methods in Social Relations. West Sussex: John Wiley and Sons Ltd.

Category: Study methods and variables

The National Guard is a portion of the Reserve Components which may be used by a state or the President to carry out emergency operations. Typically, National Guardsmen work part-time with the National Guard while maintaining a full-time civilian job or attending college.

Citation: Guard FAQs. (2019). Retrieved March 20, 2019, from https://www.nationalguard.com/guard-faqs#faq-5381

See Bronfenbrenner's Ecological Theory

Category: Theories

Non-response bias occurs when not all sample participants respond during data collection, or when they provide incomplete responses.

Category: Errors and biases

A normal distribution refers to a distribution that is symmetrical, bell-shaped, and centered on the mean. Normal distributions are important in statistics because they are required to run many statistical tests.

Category: Data analyses

The null hypothesis (H0) is a statement researchers attempt to reject (but never accept) with sample data. The null hypothesis often, but not always, proposes that no relationship exists between the tested variables.

Citation: Huck, S. W. (2008). Reading statistics and research. Boston, MA: Pearson Education, Inc.

Category: Study methods and variables

Related Terms:

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