Importance in Medical Research Essay Paper

Post from Brooke Bailey

Validity tells the educator the extent to which the results really measure what they are supposed to measure. Basically, validity is the tests’ ability to measure what it is intended to measure (Billings & Halstead, 2020). There are three categories to test validity: content-related, criterion-related, and construct-related. A valid measurement is generally reliable.

Reliability is one of the most important and fundamental domains in measuring consistency of a tool. The measurement is considered reliable if the same result can be attained consistently or is reproducible by applying the same methodology under similar conditions (Ahmed & Ishtiaq, 2021). There are three types of reliability: test-retest reliability, inter-rater reliability, and internal consistency reliability. Test-retest reliability is a measure of how consistent the results of a test are overtime (Ahmed & Ishtiaq, 2021). Inter-rater reliability measures the consistency across observers, meaning that when different observers conduct the same test, they get the sane results. Lastly, internal consistency reliability measures how well a test or survey are related to one another. Importance in Medical Research Essay Paper

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Lastly, central tendency which includes the mean, median, and mode. The mean is the average and is calculated by the sum of all scores divided by the total number of scores (McDonald, 2017). The median divides the scores in the middle and is a better measure of central tendency. This allows the instructor to see if the scores are normally distributed. The mode is the value that appears the most in a set of data.

References

Ahmed, I., & Ishtiaq, S. (2021). Reliability and validity: Importance in Medical Research. methods, 12, 13.

Billings, D. M., & Halstead, J. A. (2020). Teaching in nursing: A guide for faculty (6th ed.). Saunders. ISBN-13: 9780323554725

McDonald, M. E. (2017). The nurse educator’s guide to assessing learning outcomes (4th ed.). Jones & Bartlett Learning. ISBN-13: 9781284113365

The Response

The Basic Concepts of Measurement and Data Analysis Used to Analyze Test Results

Your discussion offers a thorough introduction to many fundamental ideas in the field of educational evaluation. When developing and deploying any kind of assessment, validity, and reliability are two of the most important criteria to keep in mind. Validity, as you define it, refers to how well a test really measures the constructs it claims to. You are right that reliability is concerned with how consistently and reliably measurements turn out. You have done a good job of explaining central tendency, including the median, mode, and mean. The data collection’s distribution may be summarized and described using the median, mode, and mean. Importance in Medical Research Essay Paper

Even while high numbers might skew the average, it nevertheless provides useful insight into the whole. The median provides the midpoint when the data are ranked and is less affected by extreme values. The mode represents the data’s most typical value. The range is a measure of the dispersion of the data. The standard deviation of a set of data shows how closely or widely the data points cluster around a central value (Hahs-Vaughn & Lomax, 2020). The inferential statistics allow us to extrapolate information from a limited sample. We use hypothesis testing to see whether the trends we observe in our data are representative of the whole. We may be quite certain that the population parameter falls inside the interval established by the confidence interval (Ali & Bhaskar, 2016).

We use regression and correlation analysis to examine the connections between two variables. The degree to which two factors move together is quantified by the concept of correlation. A positive correlation exists if both variables move up, whereas a negative one exists if one variable goes upwards and the other decreases. When two variables are known, regression may be used to predict the third. It is similar to trying to put the points on a scatter diagram into a straight line (Hahs-Vaughn & Lomax, 2020). Data visualization aids in the identification of trends and outliers. The histogram displays the distribution of values across time and space. We can see the relationship between two variables using a scatter plot, and we can learn about the distribution and identify outliers with box plots. By using bar charts, it is simple to identify which groups of data appear more often than others (Ali & Bhaskar, 2016). Importance in Medical Research Essay Paper

References

Ali, Z., & Bhaskar, S. B. (2016). Basic statistical tools in research and data analysis. Indian journal of anaesthesia, 60(9), 662. https://doi.org/10.4103%2F0019-5049.190623

Hahs-Vaughn, D. L., & Lomax, R. G. (2020). An introduction to statistical concepts. Routledge. Importance in Medical Research Essay Paper