Page 185 - BUKU SYNOPSIS

item reliability indicates the extent to which measurements generate

identical information. In other words, if the measurement is conducted

by a different party, the outcomes will not vary significantly. The

reliability scores for the person and item components of the SA

instrument are 0.90 and 0.79, respectively. The separation score can also

be used to identify the groping of items and individuals because it can

distinguish groups of respondents and groups of items; the higher the

separation score, the higher the instrument quality in terms of all

respondents and things. Person and item separation scores are 3.01 and

1.93, respectively.

Besides, the quality of the instrument can be analyzed through the

respondents’ understanding in differentiate the scale, SA instrument

consists of four scale (from very satisfied to very dissatisfied). Their

understanding reflects at the score of observation average and Andri

Threshold in Table 24.

Table 24. Rating Scale of SA Instrument

Table shows both the score of observation average and Andrich

Threshold star from the lowest to highest score, which indicate the

description of each scale (1to 4) is clear and understood well by the

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