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Related Concept Videos

Observational Studies01:11

Observational Studies

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Observational studies are a type of analytical study where researchers observe events without any interventions. In other words, the researcher does not influence the response variable or the experiment's outcome.
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One...
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Study Designs in Epidemiology01:20

Study Designs in Epidemiology

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Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
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Cross-Sectional Research01:50

Cross-Sectional Research

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In cross-sectional research, a researcher compares multiple segments of the population at the same time. If they were interested in people's dietary habits, the researcher might directly compare different groups of people by age. Instead of following a group of people for 20 years to see how their dietary habits changed from decade to decade, the researcher would study a group of 20-year-old individuals and compare them to a group of 30-year-old individuals and a group of 40-year-old...
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Longitudinal Studies01:26

Longitudinal Studies

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Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
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Case Studies01:22

Case Studies

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There are many research methods available to psychologists in their efforts to understand, describe, and explain behavior and the cognitive and biological processes that underlie it.
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Crossover Experiments01:16

Crossover Experiments

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Crossover experiments, also called the repeated-measurements design, is a study design in which all experimental units are exposed to all treatments in different periods. Crossover experiments are generally used in psychology, the pharmaceutical industry, agriculture, and medicine.
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
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Updated: Oct 13, 2025

High Throughput Co-culture Assays for the Investigation of Microbial Interactions
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Cohort Studies.

Bernadette Capili1, Joyce K Anastasi

  • 1Bernadette Capili is director of the Heilbrunn Family Center for Research Nursing at Rockefeller University, New York City. Joyce K. Anastasi is the Independence Foundation Professor of Nursing at the New York University Rory Meyers College of Nursing, New York City. This manuscript was supported in part by grant No. UL1TR001866 from the National Institutes of Health's National Center for Advancing Translational Sciences Clinical and Translational Science Awards Program. Contact author: Bernadette Capili, bcapili@rockefeller.edu . The authors have disclosed no potential conflicts of interest, financial or otherwise. A podcast with the authors is available at www.ajnonline.com .

The American Journal of Nursing
|November 18, 2021
PubMed
Summary
This summary is machine-generated.

This article series equips nurses with essential skills for clinical research participation. It covers evidence-based practice concepts, from research design to data interpretation, enhancing nursing research knowledge.

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Area of Science:

  • Nursing Research
  • Evidence-Based Practice

Background:

  • This is the seventh article in a series focused on clinical research for nurses.
  • The series aims to provide nurses with step-by-step knowledge and skills for research participation.

Purpose of the Study:

  • To systematically guide nurses through the process of engaging in clinical research.
  • To impart foundational knowledge in evidence-based practice, covering research design to data interpretation.

Main Methods:

  • The series presents concepts underpinning evidence-based practice.
  • Each article focuses on specific aspects of the research process.

Main Results:

  • Nurses will gain practical skills for research involvement.
  • Understanding of evidence-based practice principles will be enhanced.

Conclusions:

  • This series is a valuable resource for nurses seeking to advance their research capabilities.
  • The accompanying podcast offers additional insights and context from the authors.