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What factors has no significant influence on the measurement?

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in Biomedical Instrumentation by (76.6k points)
What factors has no significant influence on the measurement?

(a) skin pigmentation

(b) thickness

(c) tissue

(d) skin pigmentation, thickness and tissue

I got this question in a job interview.

This interesting question is from Electroencephalograph (EEG) topic in portion Biomedical Recorders of Biomedical Instrumentation

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Correct choice is (d) skin pigmentation, thickness and tissue

To explain I would say: The instrument can be empirically calibrated. Subject variability (skin pigmentation, thickness, tissue, sensor location, etc.) has no significant influence on the measurement.

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