**Original citation.** Soto, C.J., John, O.P., Gosling, S.D., & Potter, J. (2008). The developmental psychometrics of big five self-reports: Acquiescence, factor structure, coherence, and differentiation from ages 10 to 20. *Journal of Personality and Social Psychology, 94*(4), 718-737.
**Target of replication.** We seek to replicate the original authors' finding that variance in acquiescence scores was substantially larger in younger age groups, F(21, 230025) = 118.15, p < 0.001.
**A priori replication criteria.** Data from the present replication was derived from the same source as the data used in Soto et al.’s original analyses. The new data was selected from years not overlapping with the original’s. Only survey responses from 10-20 year old Americans and Canadians were included. Any non-English responses were also excluded.
*Participant Exclusions.* Participants who completed less than 43 out of 44 BFI items, were repeat respondents (as evidenced by either responding that they had previously completed the BFI or did not have a unique combination of IP address and demographic variables in the data set), were from outside the US or Canada, or who did not provide information regarding both their gender and their age were excluded from the analysis. Additionally, respondents whose standard deviation for BFI items were three standard deviation above or below the mean BFI standard deviation were excluded from the analysis.
*Replacing Missing Values.* For missing BFI values, the participants rounded average response to other BFI items on that particular subscale was imputed.
*Analysis.* To test whether variance in acquiescence scores differed by age and gender, a Levene’s test for homogeneity of variance was performed on the acquiescence scores for the interaction of age and gender. We expected this to be significant, following the general pattern that variance declines with age.
A draft of the replication report with more details can be found [here][1].
[1]: https://docs.google.com/document/d/1hnJnNFgKjb6QXLikzoLx98XSaJp5DtmXzZ4QuR8b6kk
