If research continues to indicate that the SAT is biased against students from low socio-economic backgrounds and does not reflect their knowledge or skills, what does that mean for the test psychometric properties?

It means that the test would have high reliability and not so for the validity.

Explanation:

Even though the test may have reliabiltiy because it can be consistent in some of the structure of evaluation. This doesn't mean that it would be a valid test, because it is biased.

The psychometrc propertes are measured both by validity and reliabiltiy. This means the score can be reliable but as it is biased, it is not reflecting the knowlede and skills so it loses it's validity.

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