THE READING QUESTION
Broad domains and narrower facets answer different descriptive questions. A carefully developed hierarchy is more than a report that divides a large score into several smaller headings.
Identify the development work
Soto and John describe the development of the BFI-2, including a hierarchical approach to personality description. The source is useful for examining how broad domains and narrower facets are designed and studied together. Read the work as evidence about that particular instrument. Its development process does not establish that an independently written five-domain questionnaire has the same coverage or measurement properties.
A fictional broad-score puzzle
A fictional participant, Celia, receives a high score on a broad organization-related scale. In conversation, she explains that she plans carefully and keeps detailed records but struggles to continue tasks when feedback is delayed. Another participant has a similar broad score but the opposite pattern: persistent effort with little advance planning. A broad summary may be useful while concealing these differences. Adding facet labels could help, but only if the questions actually distinguish the behaviors and there is enough information to interpret the narrower scores. A dashboard cannot create detail that the questionnaire did not collect.
Audit the hierarchy from both directions
For this exercise, start with each proposed facet and ask what larger domain it contributes to. Then start with the domain and ask which important aspects are missing. This two-way check prevents a developer from treating a convenient item cluster as comprehensive coverage. Examine whether one facet dominates the broad score simply because it has more questions or easier wording. For Celia, compare the practical advice from the broad summary with advice based on concrete examples of planning and persistence. If the facet interpretation changes a recommendation, the evidence for that narrower interpretation deserves particular attention rather than being assumed from the domain's reputation.
Questions for reading the development paper
Ask how the authors selected content, addressed response tendencies, and tested the proposed hierarchy. What evidence distinguishes related facets while supporting their shared domain? Which results concern the complete instrument and which concern particular scores? Consider whether a shorter form would preserve the same level of detail. For the fictional participants, what evidence would show that the different patterns reflect behavior rather than inconsistent interpretation of questions? A useful reading note identifies the design choices that support an inference, instead of borrowing an instrument's name as a general guarantee of scientific quality.
Keep the original form separate
Machiavelli Five-Trait Perspectives contains original questions and does not reproduce the BFI-2. Its current scores should be treated as reflection summaries whose own research remains unfinished. Celia can use a result to identify examples and choose a practical experiment, such as a smaller feedback interval. The source helps explain what careful instrument development involves; it does not supply direct findings about our questionnaire.
FOLLOW THE ORIGINAL SOURCES
Soto and John (2017) ↗Continue the reading
Five proposed domains, with clear construct boundaries →