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Random sampling ensures every individual in the population has an equal chance of selection, reducing bias and increasing generalizability. Option A (Stratified) divides the population into subgroups before sampling. Option B (Purposive) selects participants based on researcher judgment. Option D (Convenience) relies on availability. Random sampling is a cornerstone of quantitative research, providing stronger external validity. In counseling research, it strengthens the ability to generalize findings to larger populations.

The dependent variable is the outcome being measured—in this case, anxiety levels after the intervention. The independent variable is the relaxation program itself. Confounding variables are outside factors that may affect results (e.g., sleep). Moderator variables influence the strength of the relationship between variables. Counselors must correctly identify variables to design valid research and interpret outcomes meaningfully.

Avoiding value imposition ensures the counselor does not force personal beliefs onto the client. Autonomy (A) respects client decision-making. Nonmaleficence (C) avoids harm. Fidelity (D) involves trust and loyalty. The ACA Code of Ethics stresses maintaining client-centered values and respecting client worldviews.

Counselors are ethically bound to maintain confidentiality unless disclosure is required by law or necessary to prevent imminent harm. In cases of past abuse where there is no ongoing danger, confidentiality typically must be maintained. Mandatory reporting laws apply when minors, elders, or vulnerable adults are currently being abused or at risk. The ACA Code of Ethics directs counselors to clarify the limits of confidentiality during informed consent, ensuring clients understand both protections and exceptions.

Concurrent validity is shown when test scores align with another established measure (in this case, performance ratings) taken at the same time. Predictive validity (B) forecasts future performance. Content validity (A) ensures comprehensive item coverage. Construct validity (D) examines accuracy of the theoretical construct. Concurrent validity confirms test accuracy in present contexts.