The Pearson’s Correlation Coefficient test has four assumptions: continuous data, normality, linearity, and homoscedasticity. Statistical Hypothesis Testing worksheet and Normality Checking example solutions worksheet. For this reason, we will use the Shapiro-Wilk test as our numerical means of assessing normality. Next, check the skewness value, it it recommened not to exceed 0.5. I am doing Phd thesis to study behaviour and attitude of the people, in the study I have a questionnaire in which there are multiple choice questions, open ended questions, binary questions and likert questions (many items likert scales, i.e 36 items,5 items, 6 items, 7 items), variables are upto 150 and total sample size is 450. The Shapiro-Wilk Test is more appropriate for small sample sizes (< 50 samples), but can also handle sample sizes as large as 2000. it is assumed that the amount of difference between 4 and 3 is the same as between 2 and 1, etc. D'Agostino-Pearson Test The issue is that despite being made up of numbers, a Likert scale item is in fact a set of ordered categories. How to Test Validity questionnaire Using SPSS - SPSS Tests normality test for likert scale in spss - pawsbutler.com Because Likert scales produce what are called ordinal data, I ... and the distribution of responses is normal, you could use an independent t-test to compare the responses of the two groups. Likert scale analysis | SPSS Statistics If you want to read on Likert scales before you go any further, you can find some information in this post. YouTube. Scale 26 The MFI measures 5 dimensions of fatigue: general fatigue, mental fatigue, physical fatigue, reduced activity, and reduced motivation. Their reaction times are in speedtasks.sav, partly shown below. A Likert scale can never generate normally distributed data. EXECUTE. Please help on using SPSS to add scales of Likert-type