107,483,095 responses from 1,131,401 respondents to 95 items.
| Description | Syntax questions |
|---|---|
| Reference | Chen, T., & Hartshorne, J. K. (2021). More evidence from over 1.1 million subjects that the critical period for syntax closes in late adolescence. Cognition, 214, 104706. |
| DOI | 10.1016/j.cognition.2021.104706 |
| Licence | CC BY 4.0 |
| Source data | https://osf.io/vab8j/ |
| Responses | 107,483,095 |
|---|---|
| Respondents | 1,131,401 |
| Items | 95 |
| Response categories | 2 |
| Responses per respondent | 95 |
| Responses per item | 1,131,401 |
| Density | 1 |
| Longitudinal | FALSE |
| age range | Child (<18y) |
|---|---|
| child age (for child-focused studies) | Adolescent (12-18y) |
| construct type | Cognitive/educational |
| primary language(s) | eng |
| construct name | Syntax questions |
This table has item text in the IRW: the wording administered to respondents, not just the response codes.
| Instrument | Which English? grammaticality-judgment quiz (Hartshorne, Tenenbaum & Pinker, 2018) |
|---|---|
| Mean words per item | 3.095 |
| Mean characters per item | 15.568 |
| Mean characters per response | 10.863 |
| Flesch-Kincaid grade level | 3.324 |
This codebook is reconstructed by the IRW from the IRW data standard and the script that built it, criticalperiod_syntax.R. It is our best reading, not the source’s own codebook, and it may contain mistakes. Where the two disagree, the source data are the authority. If you find an error, please tell us.
| Column | What it is | Source column |
|---|---|---|
| IRW standard columns | ||
id | IRW standard Identifier for the focal unit being measured — typically a person, but sometimes another entity (e.g., a word in a lexical task). | made in the build script |
item | IRW standard Item identifier. | made in the build script |
resp | IRW standard Response value. | made in the build script |
What item codes and covariate values stand for is in the codebook released with the source data.
This table is larger than Redivis serves without a login, so download it with one of the packages below or while signed in to Redivis.
Or load it directly in R or Python (both need a free Redivis account; the first call opens a browser to sign in):
# R
install.packages("remotes")
remotes::install_github("itemresponsewarehouse/Rpkg")
library(irw)
df <- irw_fetch("criticalperiod_syntax")
# Python
pip install irw
import irw
df = irw.fetch("criticalperiod_syntax")
@article{Chen_2021, title={More evidence from over 1.1 million subjects that the critical period for syntax closes in late adolescence}, volume={214}, ISSN={0010-0277}, url={http://dx.doi.org/10.1016/j.cognition.2021.104706}, DOI={10.1016/j.cognition.2021.104706}, journal={Cognition}, publisher={Elsevier BV}, author={Chen, Tony and Hartshorne, Joshua K.}, year={2021}, month=sep, pages={104706} }
| IRW version | v584 |
|---|---|
| Redivis dataset | item_response_warehouse v74.0 |
| Redivis dataset DOI | 10.57761/a1gm-m985 |
| Manifest pin for this IRW version | v73.0 |
| Metadata source | irw_meta v44.0 |