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Tax knowledge and tax compliance determinants in self assessment

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no<br />

yes<br />

Figure 6.4 Attended <strong>tax</strong> courses<br />

192<br />

292<br />

876<br />

0 200 400 600 800 1000<br />

Figure 6.5 Audited by IRB<br />

1028<br />

6.4 INTERNAL VALIDITY (RELIABILITY TEST)<br />

36<br />

Internal validity refers to cause-effect relationship among <strong>in</strong>dependent <strong>and</strong> dependent<br />

variables. It attempts to answer “to what extent does the research design permit the<br />

researcher to conclude that the <strong>in</strong>dependent variable A causes a change <strong>in</strong> the dependent<br />

variable B” (Sekaran 2000:151). Research with high <strong>in</strong>ternal validity enables a researcher<br />

Yes<br />

No

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