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  2. Longitudinal study - Wikipedia

    en.wikipedia.org/wiki/Longitudinal_study

    Under longitudinal research methods, the reduction in the research sample will bias the remaining smaller sample. [ citation needed ] Practice effect is also one of the problems: longitudinal studies tend to be influenced because subjects repeat the same procedure many times (potentially introducing autocorrelation ), and this may cause their ...

  3. Glossary of clinical research - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_clinical_research

    A clinical trial is a research study to answer specific questions about vaccines or new therapies or new ways of using known treatments. Clinical trials (also called medical research and research studies) are used to determine whether new drugs or treatments are both safe and effective.

  4. Cohort study - Wikipedia

    en.wikipedia.org/wiki/Cohort_study

    A cohort study is a particular form of longitudinal study that samples a cohort (a group of people who share a defining characteristic, typically those who experienced a common event in a selected period, such as birth or graduation), performing a cross-section at intervals through time.

  5. Literature review - Wikipedia

    en.wikipedia.org/wiki/Literature_review

    A systematic review is focused on a specific research question, trying to identify, appraise, select, and synthesize all high-quality research evidence and arguments relevant to that question. A meta-analysis is typically a systematic review using statistical methods to effectively combine the data used on all selected studies to produce a more ...

  6. Survey (human research) - Wikipedia

    en.wikipedia.org/wiki/Survey_(human_research)

    A good sample selection is key as it allows one to generalize the findings from the sample to the population, which is the whole purpose of survey research. In addition to this, it is important to ensure that survey questions are not biased such as using suggestive words.

  7. Empirical research - Wikipedia

    en.wikipedia.org/wiki/Empirical_research

    The researcher attempts to describe accurately the interaction between the instrument (or the human senses) and the entity being observed.If instrumentation is involved, the researcher is expected to calibrate his/her instrument by applying it to known standard objects and documenting the results before applying it to unknown objects.

  8. Intermittent fasting may slow hair growth, study finds - AOL

    www.aol.com/intermittent-fasting-may-slow-hair...

    Intermittent fasting resulted in a hair growth speed reduction of 18% in adults who practiced the diet compared to controls who were eating a regular diet, a new study found.

  9. Evaluation - Wikipedia

    en.wikipedia.org/wiki/Evaluation

    In common usage, evaluation is a systematic determination and assessment of a subject's merit, worth and significance, using criteria governed by a set of standards.It can assist an organization, program, design, project or any other intervention or initiative to assess any aim, realizable concept/proposal, or any alternative, to help in decision-making; or to generate the degree of ...