Final answer:
The correct answer is A) True. The coding scheme can influence the scale of measures of variables in a study, affecting data interpretation and the applicable statistical tests.
Step-by-step explanation:
The coding scheme can indeed influence the scale of measures of the variables in the study. Therefore, the correct answer to the question is A) True. The reason behind this is that the way data is coded can impact how it is interpreted and analyzed. For instance, if a variable is coded differently, it can result in a change in scale from nominal to ordinal, or from interval to ratio, which affects the type of statistical tests that can be applied. It is vital to ensure accurate coding to maintain the integrity of the variables' scales and consequently, the validity of the research results.