Package 'huttenlocher1991'

Title: Vocabulary growth in 22 infants (Huttenlocher et al., 1991)
Description: Provides vocabulary growth dataset from Huttenlocher et al. (1991) <https://doi.org/10.1037/0012-1649.27.2.236>. This dataset is useful educationally because it features longitudinal/repeated measures growth data. It is also unusual because the only fixed effect predictor is quadratic time--that is, there is no intercept or linear time terms.
Authors: Tristan Mahr [cre] , Janellen Huttenlocher [aut] (author of 1991 article), Wendy Haight [aut] (author of 1991 article), Anthony Bryk [aut] (author of 1991 article), Michael Seltzer [aut] (author of 1991 article), Thomas Lyons [aut] (author of 1991 article)
Maintainer: Tristan Mahr <[email protected]>
License: MIT + file LICENSE
Version: 0.1.0
Built: 2024-11-21 05:04:53 UTC
Source: https://github.com/tjmahr/huttenlocher1991

Help Index

Vocabulary growth for 22 toddlers

Description

A dataset of children's vocabulary over time.

Usage

vocab_growth

Format

A data frame with 126 rows and 9 variables:

id

child id. there are 22 unique children

mom_speak

tbd

sex

tbd

group

tbd

log_mom

tbd

age

age in months

vocab

vocabulary, type tbd

age_12

age in months centered at 12 months

age_12_sq

age in months squared centered at 12 months

Source

Downloaded from https://ssicentral.com/index.php/products/hlm-general/hlm-examples/

References

Huttenlocher, J., Haight, W., Bryk, A., Seltzer, M., & Lyons, T. (1991). Early vocabulary growth: relation to language input and gender. Developmental psychology, 27(2), 236. https://doi.org/10.1037/0012-1649.27.2.236