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Pilot study
- 1. PILOT STUDY PREPARED BY: Mrs. DEVA PON PUSHPAM.I, ASSISTANT PROFESSOR.
- 2. INTRODUCTION • A pilot study is referred to a small scale preliminary tryout of the method to be used in an actually large study, which acquaints the researcher with problems that can be corrected in proportion for the research study or is done to provide researcher with an opportunity to try out the procedure, methods and tools of data collection.
- 3. DEFINITION • A pilot study is designed to test the feasibility of, and to support refinements of, the protocols, methods and procedures to be used in large scale trial of an intervention. - Thabane and colleagues, 2010 • Pilot study is a small scale rehearsal of main study to test the feasibility of proposed research process / protocol. - Kumar.R, 2018
- 4. PURPOSES OF PILOT STUDY • To determine the feasibility of main study. • To identify the weakness in each section. • To determine appropriateness, comprehensiveness and relevancy of the research instruments. • To test appropriateness of the data collection techniques. • To study the data collection process in terms of time duration, willingness of the subjects and availability of the subject, etc.
- 5. Contd., • To obtain preliminary data for primary outcome measures, in order to calculate the adequate sample size. • To determine adequacy of data analysis process and use of statistical tests. • To determine the psychometric properties of research instrument (validity, reliability). • To refine methodology. • To understand the study variables and confounding variables.
- 6. DESIGN AND METHODS OF PILOT STUDY • A randomized design is used for a pilot trial if the plan is to used the pilot as the basis for requesting funding for a full scale trial. • To the extent possible, all of the design features for the full trial should be tested, including the control group strategy, procedures for blinding, outcome measures and the schedule of data collection.
- 7. DATA COLLECTION IN PILOT STUDY • The data collection plan is complex because it serves two purposes: to test the viability of the instruments that would be used in the main trial and to address the various objectives of the pilot itself. • Detailed documentation about the trial and its progress should be maintained to help illuminate what went wrong and what went right. • It is useful to keep a diary or journal to record impressions and observations about the pilot experience.
- 8. DATA ANALYSIS IN PILOT STUDY • This tends to involve mainly descriptive statistics. • The analysis of the quantitative data from pilot studies can be used to guide decisions about how to proceed based on a comparison of the results to the pre established criteria. • Thematic analysis of the qualitative can confirm the wisdom of that decision and can also help researchers make adjustments to improve the likelihood that a full trial will be successful in giving the intervention a fair test. • Researchers should pay more attention to individual results in pilot studies than to group averages.
- 9. CONCLUSION • The overall purpose of pilot work, is to avoid a costly failure. • The purpose of pilot work should not be to test hypotheses because sample sizes in pilot work are too small to yield reliable estimates of effects. • A feasibility study tests specific and discrete aspects of an emerging intervention, often using a fairly simple design. • A pilot study is a small scale version of a full trial, designed to assess an entire set of procedures for implementing and evaluating intervention, and ideally involves a randomized design.