After the second factor analysis, the first factor loading values for 20 items were found to be above
0,400. And, no values were found to be close to the item’s first factor loading value. The alpha internal
consistence coefficient that was calculated for the reliability of the scale of attitudes towards material
usage was found 0,890. The total correlations of 20 items were calculated for the item differentiation and
difficulty, and they were found to be changing between 0,311 and 0,674. Table 3 presents the total
variance results of the attitude scale at the end of the factor analysis, before and after rotation.