Which of the following statements uses validity language correctly?

Question

BlackTom AI · Accepted Answer

Construct validity refers to whether a test or measure actually captures the theoretical construct it is intended to measure. In this case, saying “The construct validity may be limited because happiness was measured with a single item.” correctly uses validity language.

1) Relevant knowledge points and concepts
- Construct validity: degree to which operationalization corresponds to the theoretical construct (including content coverage, convergent/discriminant evidence).
- Reliability: consistency of a measure; low reliability (e.g., from single-item measures) attenuates observed relationships and undermines validity.
- Internal vs. external validity: internal relates to causal inference, external to generalizability—neither is the same as construct validity.

2) Step-by-step reasoning
- Happiness is a multi-faceted psychological construct (affective, cognitive components). A single-item cannot cover multiple facets or produce stable scores across contexts.
- Single-item measures typically have lower reliability (no internal consistency estimate like Cronbach’s alpha) and limited content coverage.
- Low reliability and poor content coverage reduce confidence that the item truly represents the construct, so construct validity is plausibly limited.

3) Calculations/intermediate steps
- No numerical calculations are required. Conceptually: observed correlation = true correlation × reliability√(reliability), so lower reliability reduces observed associations and inflates uncertainty about construct validity.

4) Why the correct answer is correct
- The statement correctly identifies a threat to construct validity (insufficient measurement breadth and reliability) and uses cautious language (“may be limited”), which is appropriate because construct validity is evaluated with evidence, not declared absolutely.

5) Why other options would be incorrect (briefly)
- Common misuses: conflating reliability with validity (e.g., saying “valid because alpha is high”); confusing construct validity with internal/external validity; claiming validity is low based solely on sample size or p-values. Those would misuse validity terminology.

6) Conclusion
The provided statement is an appropriate and correctly worded use of validity language. Final answer confirmed: “The construct validity may be limited because happiness was measured with a single item.”

Which of the following statements uses validity language correctly?单项选择题

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