Name the study in which the observation or data are referred to for more than one point of time?

Appeared in: DSSSB - 29 August 2019 (Shift-1)

Explanation

The defining characteristic of a longitudinal study is the collection of data at more than one point in time.
This design allows researchers to observe changes, developments, and trends within the same subjects over an extended period.
Unlike a cross-sectional study which provides a 'snapshot' at one moment, a longitudinal study provides a 'movie', showing processes as they evolve.
This method is ideal for studying the natural history of a disease, the effects of long-term interventions, or developmental trends.

Option A: An experimental study is defined by the manipulation of variables by the researcher to determine cause-and-effect, not by the timing of data collection. It can be cross-sectional or longitudinal.
Option B: Clinical trials are a specific type of experimental study used to test new treatments or drugs on humans. While they almost always involve follow-up over time (making them longitudinal), the term 'longitudinal study' is the broader, more precise answer for a design defined by multiple data points.
Option D: An evaluative study's primary purpose is to assess the merit or worth of a program or practice. It describes the purpose of the research, not the method of data collection over time. It can use any number of designs, including longitudinal.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Research study designs based on time as background academic context rather than a clinical decision trigger.
Understanding study designs is fundamental for nurses to practice evidence-based care. It allows them to critically appraise research articles and determine the strength of the evidence.
When reading an article about the long-term effects of a nursing intervention, a nurse can identify it as a longitudinal study and assess for potential issues like attrition (loss of participants over time).
A nurse manager might use findings from longitudinal studies on nurse burnout to implement phased interventions and track their effectiveness over several years.

How to Approach the Question

Concept Tested & Keywords

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E6 NursingResearch Polit 11e Part 1 p. 177-179

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) p. 62-64

E6 NursingResearch Suresh Sharma 5e Part 1 p. 191-193

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