smell: Smell data on olfactory function by age group
In slgf: Bayesian Model Selection with Suspected Latent Grouping Factors

smell

R Documentation

Smell data on olfactory function by age group

Description

O'Brien and Heft (1995) studied the University of Pennsylvania Smell Identification Test (UPSIT). 180 subjects of different age groups were asked to describe 40 different odors. Olfactory index was quantified by the Freeman-Tukey modified arcsine transformation on the proportion of correctly identified odors. Subjects were divided into five age groups: group 1 if age 2 or younger; group 2 if between ages 26 and 40; group 3 if between ages 41 and 55; group 4 if between ages 56 and 70; and group 5 if older than 75.

Usage

data(smell)

Format

A data frame with 180 rows and 2 variables:

agecat: age category, from 1 to 5.
olf: olfactory function, measured as the Freeman-Tukey modified arcsine transformation on the proportion of correctly identified odors.