what matrix is used to calculate alpha in a pilot scale what is the internal reliability of a pilot scale how to calculate alpha of a pilot scale what is spearman correlation coefficients how many items are on a pilot scale internal reliability of pilot scale how to measure reliability which factor to use in the calculation of alpha for ordinal data what is the spearman correlation matrix used for what is spearman's formula for reliability how to estimate reliability using spearman correlation matrix how to calcite alpha on the pilot scale what is spearman correlation matrix used for internal reliability for ordinal scale how do you calculate the reliability of the pilot scale what is standard deviation of spearman coefficient what does spearman correlation matrix do who is spearman correlation matrix what is spearman correlation matrix what matrix can be used to calculate correlation coefficient