Type 1, 2, 3 of Errors in Research

Rodrigo Arrangoiz MS, MD, FACS, FSSO

Type II error refers to the acceptance of the null hypothesis in a study when the null hypothesis is actually incorrect

Type I error occurs when the null hypothesis is rejected although it is true

Type III error occurs when the null hypothesis is rejected but the wrong assumptions are used

Random error is defined as errors that occur in experimental measurements secondary to unknown and unpredictable changes in the experimental conditions

Variance error is defined as all sources of variability in an experiment that are not subject to investigation.

References

Harvey BJ, Lang TA. Hypothesis testing, study power, and sample size. Chest. 2010;138:734-737.

Wuensch K. Type III errors. Available at
http://core.ecu.edu/psyc/wuenschk/stathelp/Type_III.htm

Exell RHB. Random vs systematic error. Available at http://www.physics.umd.edu/courses/Phys276/Hill/Information/Notes/ErrorAnalysis.html

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Published by Rodrigo Arrangoiz MS, MD, FACS, FSSO

My name is Rodrigo Arrangoiz I am a breast surgeon/ thyroid surgeon / parathyroid surgeon / head and neck surgeon / surgical oncologist that works at Center for Advanced Surgical Oncology in Miami, Florida. I was trained as a surgeon at Michigan State University from (2005 to 2010) where I was a chief resident in 2010. My surgical oncology and head and neck training was performed at the Fox Chase Cancer Center in Philadelphia from 2010 to 2012. At the same time I underwent a masters in science (Clinical research for health professionals) at the University of Drexel. Through the International Federation of Head and Neck Societies / Memorial Sloan Kettering Cancer Center I performed a two year head and neck surgery and oncology / endocrine fellowship that ended in 2016. Mi nombre es Rodrigo Arrangoiz, soy cirujano oncólogo / cirujano de tumores de cabeza y cuello / cirujano endocrino que trabaja Center for Advanced Surgical Oncology en Miami, Florida. Fui entrenado como cirujano en Michigan State University (2005 a 2010 ) donde fui jefe de residentes en 2010. Mi formación en oncología quirúrgica y e n tumores de cabeza y cuello se realizó en el Fox Chase Cancer Center en Filadelfia de 2010 a 2012. Al mismo tiempo, me sometí a una maestría en ciencias (investigación clínica para profesionales de la salud) en la Universidad de Drexel. A través de la Federación Internacional de Sociedades de Cabeza y Cuello / Memorial Sloan Kettering Cancer Center realicé una sub especialidad en cirugía de cabeza y cuello / cirugia endocrina de dos años que terminó en 2016.

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