Rather the nature of construct validity is qualiatative. When an indictor is expressed in terms of multiple items of an instrument, factor analysis is used for construct validation. The presence of test bias definitely affects the measurement of the psychological construct. However, the absence of test bias does not guarantee that the test possesses construct validity. In other words, the absence of test bias is a necessary, but isn't a sufficient condition.
Reliability is an aspect of construct validity.
As assessment becomes less standardized, distinctions between reliability and validity blur. In many situations such as searching faculty candidate and conferring graduate degree, committee members are not trained to agree on a common set of criteria and standards Inconsistency in students' performance across tasks does not invalidate the assessment. Rather it becomes an empirical puzzle to be solved by searching for a more comprehensive interpretation . Rather it would provide an impetus for dialog. The very definition of a construct implies a domain of content.