crawl: Crawling babies by month

In faraway: Functions and Datasets for Books by Julian Faraway

Crawling babies by month

Description

A study investigated whether babies take longer to learn to crawl in cold months when they are often bundled in clothes that restrict their movement, than in warmer months. The study sought an association between babies' first crawling age and the average temperature during the month they first try to crawl (about 6 months after birth). Parents brought their babies into the University of Denver Infant Study Center between 1988-1991 for the study. The parents reported the birth month and age at which their child was first able to creep or crawl a distance of four feet in one minute. Data were collected on 208 boys and 206 girls (40 pairs of which were twins)

Format

A data frame with 12 observations on the following 4 variables.

crawling

average crawling age in weeks

SD

standard deviation of crawling age

n

sample size

temperature

average temperature(F) six months after birth

Source

Benson, Janette. (1993). Infant Behavior and Development

Examples

data(crawl)
## maybe str(crawl) ; plot(crawl) ...

faraway documentation built on Aug. 23, 2022, 5:08 p.m.