psy (version 1.2)

sleep: Ecological and Constitutional Data in Mammals

Description

Data from which conclusions were drawn in the article Mammals: Ecological and Constitutional Correlates, by Allison, T. and Cicchetti, D. (1976) Science, November 12, vol. 194, pp.732-734

Usage

data(sleep)

Format

This data frame contains the following columns:

Species

a factor with levels

Body.weight

a numeric vector, body weight in kg

Brain.weight

a numeric vector, Brain weight in g

Slow.wave.sleep

a numeric vector, nondreaming sleep (hrs/day)

Paradoxical.sleep

a numeric vector, dreaming sleep (hrs/day)

Total.sleep

a numeric vector, nondreaming + "dreaming" (hrs/day)

Maximum.life.span

a numeric vector (in years)

Gestation.time

a numeric vector (in days)

Predation

a numeric vector, Predation index (1 min - 5 max)

Sleep.exposure

a numeric vector, Sleep exposure index (1 min - 5 max)

Danger

a numeric vector, Overall danger index (1 min - 5 max)

References

Mammals: Ecological and Constitutional Correlates, by Allison, T. and Cicchetti, D. (1976) Science, November 12, vol. 194, pp.732-734

Examples

# NOT RUN {
data(sleep)
str(sleep)
# }