Reliability & Validity Explained | Statistics in Physiotherapy | Diagnosis
While validity is the degree to which a test or tool measures what it claims to measure or in other words the accuracy of a test, reliability is the degree to which a test or tool produces similar results under consistent conditions or in other words the precision of a test. Good reliability of a test or tool is important because if the people who interpret the test cannot agree on the interpretation the test result will be of little use.
We can distinguish between intra-rater reliability and inter-rater reliability. Intra-rater reliability relates to the agreement between different measurements of one person and inter-rater reliability relates to the agreement between two or more raters. Now let’s look at both concepts of validity and reliability and how they relate to each other with the famous dartboard example: The bullseye represents the golden standard.
In scenario A, we hit the bull’s eye by chance so this dart was accurate, while all other darts are covered everywhere over the dartboard so we had bad precision or in other words poor reliability. An example could be a pivot-shift test for an ACL tear which is an accurate test that’s hard to perform. So if you are untrained it could be that your results are not consistent.
In scenario B we are precise or reliable because all of our shots land together but we are not accurate because we didn’t hit bull’s eye once. An example could be a scale that always measures 5 kilos too much. So our daily weighing would be pretty consistent, but not accurately display our actual weight.
In scenario C we are neither reliable nor accurate and in scenario D we are both reliable and accurate.
To sum it up, reliability is an important concept in statistics and without good reliability, the best clinical test in the world will be useless, because every test always relies to at least some degree on subjective interpretation by the observer. With training and with precise protocols, you will be able to improve the reliability with which you are performing clinical tests and measurements. Alright, so this was our video on reliability.
If you want to dig a little bit deeper into the topic and you want to know what the Kappa value is, click on the following link.
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This course was everything I expected and more! Logical structure, enough depth and clinical reasoning is challenged.Lucinda de Vries20/02/23Orthopedic Physiotherapy of the Upper and Lower Extremities ORTHOPEDIC PHYSIOTHERAPY OF THE UPPER AND LOWER EXTREMITIES
Super interessante en leuke cursus. Ook zeker voor afgestudeerde fysiotherapeuten om hun kennis weer op te halen/bij te spijkeren. Ondanks dat ik al 5 jaar werkzaam ben als fysiotherapeut was deze cursus zeker een uitdaging en op veel punten echt heel moeilijk en leerzaam.
Het enige vervelende (waar weinig aan gedaan kan worden). de vertalingen eng-nl zijn soms heel onduidelijk.
Al met al zeer genoten tijdens het volgen van deze cursus en er zullen er zeker meerdere volgen.
- Aurelio Basile09/12/22Orthopedic Physiotherapy of the Upper and Lower Extremities ORTHOPEDIC PHYSIOTERAPY OF THE UPPER AND LOWER EXTREMITIES
Great course! It allows you to make objective assessments with order and clarity. As a result, it is possible to set up effective and efficient treatments.
I also found the sections on the epidemiology and course of the diseases very useful, in order to educate patients and obtain greater compliance with the treatment. Super recommended!!Aurelio Basile09/12/22Orthopedic Physiotherapy of the Spine ORTHOPEDIC PHYSIOTERAPY OF THE SPINE
Fantastic course! simple to follow and extremely helpful in assessing and treating spinal related issues. Furthermore, it is possible to immediately apply the knowledge acquired in the clinic. A must for us physiotherapists.DUNCAN10/01/21Orthopedic Physiotherapy of the Upper and Lower Extremities GREAT COURSE
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if i may give one suggestion that is maybe hard to implement. but i sometimes struggle with explaining things in patient language. so maybe add some frequent asked questions / mechanisms from patients and how to explain it simple or with a metaphore ?
Thanks again for all your work putted in to this course <3JEROEN VAN ZANTEN20/10/20Orthopedic Physiotherapy of the Upper and Lower Extremities I LOVE IT
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Starkes Konzept wissenschaftlich untermauert für die Haupt-Diagnosen der Extremitäten. Sehr übersichtliches Design. Gute Möglichkeit das Lernen einzuteilen. Fortbildung der Zukunft. Nur zu empfehlen. Freue mich auf die nächsten Kurse!Marc07/01/20Orthopedic Physiotherapy of the Upper and Lower Extremities LEERZAAM
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Great video footage of tests and exercises! Great links to articles! All very useful for dailey practice (even in osteopathy ;)) and immediately applicable! Should contribute to communication with other health care specialists e.g. when it comes to clinical reasoning for requesting further medical examination e.g. immaging. I already recommended the course to several colleagues!
One point of attention: I got the feeling that the short quizzes at the end of each unit didn’t always mach the unit’s content or plainly state differently (e.g. Type of SLAP lesions).
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Much of it was fresh rehearsal including some new insights! Would recommend.DIMITRY22/12/19Orthopedic Physiotherapy of the Upper and Lower Extremities THE FUTURE OF PHYSIOTHERAPY
I think this course should be done by all physiotherapists! The evidence based principle should be adopted by every physiotherapist, this course is a great way to learn how to apply tests, but also background information, advice for patients and some rehabilitation. I believe this kind of course is the future of physiotherapy and is very suitable for everyone.Marijke13/12/19Orthopedic Physiotherapy of the Upper and Lower Extremities BEDANKT!
Uitstekende manier van leren.
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The course was very interesting Learned a lot!JORN08/12/19Orthopedic Physiotherapy of the Upper and Lower Extremities ZEER LEERZAAM!
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Zorg er wel voor dat je engels up-to-date is.MATAN03/12/19Orthopedic Physiotherapy of the Upper and Lower Extremities GREAT COURSE
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I hope you guys make another course for the spine . I wil take it!Rik24/10/19Orthopedic Physiotherapy of the Upper and Lower Extremities This course showed me some new insights that I can use in my own practice.
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Content is extremely useful in daily physiotherapy routine and all the material is based upon scientific researches. I did rehearse the screening and assessment process.
Great illustration of what online education should be!Jerry06/06/19GREAT! It was an excellent course! Took me 33 hours and 26 minutes to complete. I liked the cases a lot and the statistics gave me a totally new point of view to assess different tests. This course will make me a better physiotherapist. Thank you!
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Curso Magnifico!!!, honestamente, es la universidad del futuro, aprenderá todas las patologías comunes del cuerpo con un solo clic: epidemiología, factores pronósticos, curso, evaluación y tratamiento, todo desde un punto de vista científico. Bien estructurado, fácil de leer, navegación rápida, videos de alta calidad. Podrás responder a tu paciente cuánto tiempo durarán sus molestias basado en la última evidencia con los números adecuados, lo que les dará un pronóstico justo que los ayudará a mantenerlos motivados para la terapia y ser pacientes y constantes. No hay un día en el que no lo use en la práctica para consultar una test específico o la sensibilidad de este. Incluso se obtienen puntos de acreditación, un monton ellos en comparación con otros cursos que luego nunca usas en su rutina diaria. 100% recomendable!!Nathan28/05/19Orthopedic Physiotherapy of the Upper and Lower Extremities A great course for new grads! I have found this course to be very well put together. Firstly the formatting is very user friendly – it’s easy to work through but also very to easy to navigate to specific sections to use as a reference resource. As always with these guys the videos are very high quality. The attention to detail with academic references is also spot on. You can be assured that the info is evidence based. Overall, highly recommended.Stijn14/02/19GREAT COURSE I thinks this course is great, I find the framework it teaches you very useful in assessing my patients. I like how the different pathologies are very clearly explained from epidemiology to pathophysiology to diagnostics to treatment, all evidence based. The Physiotutors-style videos used to explain the subject matter are really useful for studying too. Finally, the assingments at the end of the chapters are a great way to test and practice your knowledge on the subject you just studied.