In Simple Words
Think of adult personality traits like set concrete paths across a public park. Structured workplace practice—such as role-playing assertive communication and executing daily goal-setting—acts like repaving those paths, proving that adults can forge wider, more confident walking routes even late in life.
Women surveyed in the Bengaluru trial
- No training on control lines
- Comparison group
- P.A.C.E. soft skills training
- Estimated higher extraversion
At program completion: estimated increase of 0.164 SD in outgoing behavior. Uncertain after accounting for multiple tests (q = 0.108); no proof it caused output gains.
See source →Research question
Dynamic human capital accumulation models hypothesize that non-cognitive personality traits crystallize in early childhood, making adult workplace interventions ineffective at shifting fundamental psychological traits.
Participants
N = 621 female garment workers in the primary RCT survey sample, plus N = 675 workers in a supplemental propensity score-matched sample in Bengaluru, India.
Study Design
Randomized controlled trial (RCT) cross-sectional survey and supplemental propensity score inverse probability weighted survey assessing Big Five personality dimensions, grit, and autonomous motivation.
Results
Soft skills training produced a statistically significant increase in extraversion of 0.164 standard deviations (p < 0.05) in the experimental sample, as well as a 0.20 standard deviation increase in extraversion and grit (p < 0.05) in the propensity score-matched sample, with zero impact on placebo cognitive tests (arithmetic and digit span recall).
Takeaway
Design structured workplace role-playing and goal-setting sessions to systematically expand adult non-cognitive traits such as extraversion and grit among frontline labor forces.
Source and citation
See source →Read alongside the research
Plain-English glossary
Original explanations, informed by the references below. Examples are illustrations, not data from the studies above. The research text stays unchanged.
- Randomized controlled trial
A study that uses chance, like drawing lots, to decide who receives each option being compared. Researchers compare the groups’ outcomes to estimate the effect of those options.
ExampleA lottery assigns volunteers to a training programme or a comparison group. Researchers then compare their outcomes.
GET-IT glossary · Randomized study ↗Read more about randomized controlled trial →- Statistically significant
A label used when a result passes a chosen statistical threshold, often p < 0.05. It does not show how large or useful an effect is. A result that is not statistically significant does not prove there is no effect.
ExampleA study reports p = 0.03 against a 0.05 threshold. It passes that test, but the effect could still be too small to matter.
American Statistical Association · Statement on p-values ↗Read more about statistically significant →