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<p>tools are available for the researchers to help them decide about this exact formulation of their questions, for instance estimating the quality of a question using <a href="page.php?w=Multitrait-multimethod_matrix">MTMM experiments</a>. This information about the quality can also be used to <a href="page.php?w=Correction_for_attenuation">correct for measurement error</a>.</p>

<p><big>Effect on regression analysis</big></p>
<p>If the <a href="page.php?w=dependent_variable">dependent variable</a> in a regression is measured with error, regression analysis</p><p>
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