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Choosing a well-validated nonverbal measure with appropriate norms is typically the best way to reduce language-related barriers while still using a standardized approach to estimate cognitive abilities. This is especially important when the available evidence supports the test’s validity for individuals with similar linguistic and cultural backgrounds. Using an interpreter to translate a verbally loaded intelligence test can introduce additional sources of error (e.g., changes in item difficulty or meaning) and does not necessarily address whether the test’s norms and validity evidence apply to the examinee’s population. Relying primarily on informal observation and unstructured conversation is generally less defensible for estimating cognitive ability because it lacks standardization and increases subjectivity. Postponing testing until English proficiency improves may delay needed services and is not necessary when appropriate measures and accommodations are available. Even nonverbal tests can still have some cultural loading, so test selection should be guided by the best available norms and validity evidence.

Changing the measurement instrument during a study is an instrumentation change threat to internal validity because scores may differ due to the new version of the assessment rather than the intervention. Maturation refers to natural changes within participants over time (e.g., improvement from getting older or acclimating), not a change in the tool. History refers to outside events occurring during the study that affect outcomes (e.g., a stressful community event), not an alteration to measurement procedures. The testing effect occurs when taking an earlier test influences later performance (e.g., practice or familiarity), even when the instrument itself remains the same.

The progression from limited self-awareness and high reliance on guidance, to greater awareness with frustration/uncertainty, to increased autonomy and personal responsibility is most consistent with the Integrated Developmental Model described by Stoltenberg and McNeill. That model conceptualizes supervisees as moving through levels characterized by changing self/other awareness, motivation, and autonomy—matching Alex’s shift from dependence and low insight, to conflicted awareness and needing structure, to more self-directed practice. The choice naming Hawkins and Shohet is primarily a process-focused model (often described as the “seven-eyed” model) for structuring what to attend to in supervision rather than a stage-based developmental sequence. The choice naming Bernard and Goodyear is best known for the discrimination model, emphasizing supervisor roles (e.g., teacher/counselor/consultant) and foci (e.g., intervention, conceptualization, personalization) rather than mapping supervisees through developmental levels. The choice naming Hess is not the standard match for this widely taught developmental-level sequence compared with Stoltenberg and McNeill.