They found that people who tended to have lower social connection tended to have lower well-being.

Question

BlackTom AI · Accepted Answer

Between-person effect indicates that differences between individuals on one variable are associated with differences between individuals on another variable.

1. Relevant knowledge points and concepts
- Between-person (or cross-sectional) effect: association comparing different people’s typical levels (trait-like differences).  
- Within-person (or within-person/time-varying) effect: association of deviations from an individual’s own average over time.  
- Level 2 effect: terminology from multilevel models referring to effects at the person level (between-person).  
- Random effect: variance component capturing individual-specific deviations (intercepts/slopes), not the fixed association described here.

2. Step-by-step reasoning
- The sentence says “people who tended to have lower social connection tended to have lower well-being.” The phrase “people who tended to have” refers to stable, person-level tendencies (i.e., some people are generally lower on social connection).  
- The comparison is across people: it links one person’s typical social connection to that person’s typical well-being, which is the hallmark of a between-person effect.  
- It does not describe within-person changes (e.g., “when a person feels less connected than usual, they feel worse this day”), so it’s not a within-person effect.  
- It’s describing a fixed association across individuals, not the variance component captured by a random effect.

3. Calculations
- Not applicable; this is conceptual inference from phrasing.

4. Why the correct answer is correct
- “Between-person effect” precisely names the pattern: people who are lower on one trait (social connection) are also lower on another trait (well-being) when comparing individuals.

5. Why other options are incorrect
- Level 2 effect: technically synonymous with between-person in multilevel terminology, but the provided correct label is “between-person effect.”  
- Within-person effect: would require wording about changes within the same person over time (not present).  
- Random effect: refers to individual-specific variability (intercepts/slopes), not the described cross-person association.

6. Conclusion
The observed pattern is a between-person effect, matching the provided answer: between-person effect.

They found that people who tended to have lower social connection tended to have lower well-being.单项选择题

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