A standardised instrument is one that has been constructed according to established procedures, with documented reliability and validity, and often with norms based on large representative samples. Such tests come with manuals describing administration, scoring and interpretation. Using standardised instruments allows researchers to compare scores with known benchmarks. Because the stem describes a test already developed, validated and normed, it is clearly referring to a standardised instrument.
Option A:
Teacher-made tests are locally developed by teachers for use in specific classes or courses and may not have undergone rigorous psychometric evaluation or norming on large samples. While useful for classroom decisions, they lack the standardisation described in the stem. Therefore, teacher-made is not the correct completion.
Option B:
Standardised instruments provide consistent procedures across administrators and contexts, enhancing comparability and reducing subjective variation. Their technical properties are well documented, which supports more confident interpretation of results. This matches the description in the question, confirming standardised as the appropriate answer.
Option C:
Informal tools are loosely structured methods such as casual observations or unstructured interviews without fixed scoring rules. They may help in exploratory understanding but do not possess the formal validation and norms associated with standardised instruments. Hence, informal is not suitable here.
Option D:
Projective tests invite respondents to interpret ambiguous stimuli, with their responses believed to project underlying motives or attitudes, and are common in clinical settings. While some projective tests may be standardised, the term projective alone does not necessarily imply prior validation and norming as highlighted in the stem. Thus, projective is not the best option.
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