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Test–retest reliability measures the stability of scores over time. Internal consistency (A) assesses item homogeneity. Concurrent validity (C) compares with established measures. Construct validity (D) determines whether a test truly measures the intended concept. Counselors must evaluate reliability before relying on assessment results.

The termination stage emphasizes reflection, consolidation of gains, and transfer of learning. Forming involves orientation, storming involves conflict, and working involves deep exploration. Termination prepares clients for continued growth beyond group.

Ethical termination involves giving adequate notice and referrals. Ending abruptly (A) is abandonment, waiting (C) ignores responsibility, and continuing without legal compliance (D) is unethical.

MI emphasizes collaboration, evoking change talk, and rolling with resistance. Persuasion (A) and confrontation (B) increase resistance. Mandatory tasks (D) undermine autonomy. MI aligns with client-centered principles while guiding toward behavior change.

Random assignment minimizes confounding variables, strengthening internal validity. Random sampling (C) enhances external validity. Large sample size (A) improves power. Replication (D) supports generalizability.