Below is a correlation matrix for the Self esteem items from a data set similar to our class Questionnaire Data set. Calculate the average inter-item correlation (ra) and the internal consistency reliability of the scale (on reverse) for all 6 items using the Spearman Brown formula. Calculate the average inter-item correlation (ra ) and the reliability of a selfesteem scale that consisted of items 1, 2, and 3 only. (Use the correlations in the table below). Calculate the average inter-item correlation (ra) and the reliability of a self esteem scale that consisted of items 4, 5, and 6 only. Using the examples in c-e above, discuss the effect that increasing the number of items has on the reliability of a scale. Using the examples in d and 9 above, discuss the effect that inter-item correlation (r8 ) has on the reliability of a scale. item 1 2 3 4 5 6 1 1 2 .57 1 3 .52 .65 1 4 .63 .57 .56 1 5 .46 .49 .34 .35 1 6 .47 .40 .46 .33 .43 1