Critical Appraisal: the structured process of examining a piece of research in order to determine its strengths and limitations, and therefore the relevance or weight it should have in addressing your research question.
Evidence-Based Practice: refers to nursing practice that utilizes research findings as the foundation for nurses' decisions, activities, and interactions with clients.
Reliability: this term has several meanings. As far as measurement is concerned, an instrument is called reliable if it produces consistent measures from time to time, from measurer to measurer, etc. The term is also used in statistical analysis (a sample statistic is reliable if it does not vary much from sample to sample).
Validity: estimates how well the instrument measures what it claims to measure. Literature usually describes three forms of validity: content, criterion, and construct. Validity assessment is a creative process of building evidence to support the accuracy of measurement.
Sampling: the process of selecting a subset of subjects from a larger set (population) of subjects.
Qualitative Research: includes all modes of inquiry that do no rely on numbers or statistical methods. This approach is grounded more in theory, ethnography, and case study methods.
Quantitative Research: consists of the collection, tabulation, summarization, and analysis of numerical data for the purpose of answering research questions or hypotheses. Quantitative research uses statistical methodology at every stage of the research process.
Mixed Methods Research: associated with research that uses a combination of methods that are usually identified with qualitative and quantitative research.
Meta-Analysis: a quantitative approach that permits the synthesis and integration of results from multiple individual studies focused on a specific research question. It involves the application of the research process to a collection of studies in a specific area.
Systematic Review: summarizes evidence across relevant studies, published and unpublished. It involves the identification, selection, appraisal, and synthesis of the best available evidence for clinical deicison making. Systematic reviews are conducted to answer specific, often narrow, clinical questions.