Page 184 - BUKU SYNOPSIS

2) Reliability

Validity and reliability tests are essential things that need to be fulfilled

so that the instruments used in research can have trustworthiness. In the

Rasch model, validity and reliability tests can be seen in the person and

item measure table by analyzing several aspects shown in the following

Table 23.

Table 23. Summary Statistics of Person and Items of SA Instrument

Summary of Measure Person

Summary of Measure Items

CRONBACH ALPHA (KR-20) Person RAW SCORE "TEST" RELIABILITY = .98 SEM = .92

The summary statistics in table 23 provide general information about the

respondents, the instruments utilized, and the person-item interactions.

The average score of respondents on the SA instrument is depicted in

Figure 1 as a value of 74. In addition, Alpha Cronbach's coefficient is

used to measure reliability, or the interaction between a person and an

item. Figure 1 displays a Cronbach's Alpha score of 0.98. Person and

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