DB2 - Grade: A PDF

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After comparing the technical data from both tests A and B, I mind myself choosing instrument A. This is because the overall the sample correlation coefficient is lower in test B which suggests that test B has less of a correlation than test A (LaMorte, 2021). this can be seen by comparing the correlation coefficients side by side for each test. First of all, when looking at reliability correlation coefficient for the Test-retest scores fall in favor of test A with a score of (r = .81) and test B with a score range of (r = .61-.71). When validating each of the test it is clear that there is more validating content for test A over test B. Test A utilizes working definitions, tables, wrote items, and expert peer review. Whereas, test B uses one model of self-esteem. The convergent in test proves to be more reliable than that of test B. Furthermore, Test A has homogeneity by using scaled test items that are similar (Sheperis et al., 2020). Each of the scales have relatively high correlation coefficients such as the Social Scale with a rating of .67, a rating of .79 for the Personal Scale, and an overall scale of .89. Test B, on the other hand, uses many scales but none of those scales are homogenous. One other reason that I chose test A over test B is the number of items used for the respective test. Test A uses 40 items where test B uses 117. In this case there is not strength in numbers. Sheperis et al. (2020) indicate that a higher number of test items can exaggerate the reliability coefficient because the equation is dependent on the number of items in a test. The more items there are, the higher the chances of the test being unreliable (Sheperis et al., 2020).

LaMorte, W. W. (2021). PH717 module 9 - correlation and regression. The Correlation Coefficient (r). Retrieved September 10, 2021, from https://sphweb.bumc.bu.edu/otlt/MPH-Modules/PH717-QuantCore/PH717-Module9Correlation-Regression/PH717-Module9-Correlation-Regression4.html#:~:text=The %20sample%20correlation%20coefficient%20(r,for%20accumulated%20saving%20over

%20time.&text=A%20correlation%20coefficient%20close%20to,little%2C%20if%20any %2C%20correlation. Sheperis, C., Drummond, R. J., & Jones, K. D. (2020). Assessment procedures for counselors and helping professionals. Pearson....