Related Experiment Videos
Reliability and validity of the evidence-based practice confidence (EPIC) scale.
Nancy M Salbach1, Susan B Jaglal, Jack I Williams
1Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, ON, Canada. nancy.salbach@utoronto.ca
Summary
The Evidence-Based Practice Confidence (EPIC) scale demonstrates excellent reliability and acceptable validity for physical therapists. This tool accurately measures confidence in using research in clinical practice, with minimal error on retesting.
Area of Science:
- Health Professions
- Physical Therapy
- Research Methodology
Background:
- Assessing the reliability and validity of measurement tools is crucial in healthcare.
- The Evidence-Based Practice Confidence (EPIC) scale measures physical therapists' (PTs) confidence in using research.
- Previous evaluations of the EPIC scale's psychometric properties were limited.
Purpose of the Study:
- To evaluate the reliability, minimal detectable change (MDC), and construct validity of the EPIC scale.
- To determine if the EPIC scale is a dependable tool for PTs in clinical settings.
Main Methods:
- A longitudinal mail survey was conducted with 275 PTs at baseline and 187 at retest.
- Internal consistency was assessed using Cronbach's alpha.
- Test-retest reliability and MDC were calculated using the intraclass correlation coefficient (ICC).
- Construct validity was examined by correlating EPIC scores with education and research utilization frequency.
Main Results:
- The EPIC scale exhibited excellent internal consistency (Cronbach's alpha = 0.89) and test-retest reliability (ICC = 0.89).
- The minimal detectable change (MDC95) was 4.1 percentage points, indicating low measurement error.
- Higher EPIC scores were associated with advanced degrees and more frequent use of research in clinical decision-making, supporting construct validity.
Conclusions:
- The EPIC scale demonstrates excellent test-retest reliability and acceptable construct validity for physical therapists.
- The scale has minimal measurement error, making it suitable for repeated use in clinical practice.
- Further validation in other health professional groups is recommended.
Related Concept Videos
01:29Reliability and Validity
Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.
01:22Self-Report Tests of Personality
Self-report inventories are objective personality assessments that use multiple-choice items or numbered scales, typically ranging from 1 (strongly disagree) to 5 (strongly agree). They are often called Likert scales after Rensis Likert. These inventories are widely used due to their ease of administration and cost-effectiveness. One of the most prominent examples is the Minnesota Multiphasic Personality Inventory (MMPI), initially developed in the 1940s to assess abnormal personality traits.
01:21Methods of Documentation III: PIE
Problem-intervention-evaluation (PIE) is a systematic approach to documentation used in healthcare settings for clinical decision-making and patient care planning. It is a structured approach to organizing patient data based on problems, interventions, and evaluations. Here's a breakdown of its key features and considerations:
01:29Self-Efficacy
Self-efficacy is the belief in one's capacity to organize and execute actions necessary to manage prospective situations. This belief significantly influences how individuals approach goals, tasks, and challenges across different domains of life.Psychological and Educational ImpactsIndividuals with strong self-efficacy are more resilient in the face of difficulties. They are more likely to adopt effective problem-solving strategies, persist through obstacles, and regulate emotions such as...
01:18The Scientific Method in Nursing Process
The scientific method provides the foundation for any research. It is the most reliable and objective of all forms of gaining knowledge and guides in applying research-based evidence in practice and conducting future research.
When using research findings to change practice, one must understand the process used to guide a study. The scientific method is a systematic, step-by-step process that supports the data's validity, reliability, and generalizability. As a result, findings can be safely...
When using research findings to change practice, one must understand the process used to guide a study. The scientific method is a systematic, step-by-step process that supports the data's validity, reliability, and generalizability. As a result, findings can be safely...
01:24Sources of Self-Esteem II: Performance Feedback
Self-esteem is intricately tied to our perception of competence and our ability to exert control over our lives. One of the primary sources of this perception is performance feedback — the ongoing evaluation of our actions in terms of success and failure. According to Franks and Marolla (1976), people derive self-worth from experiencing themselves as causal agents, capable of achieving goals and overcoming obstacles. This process nurtures a critical component of self-esteem: self-efficacy,...