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| Cowles   | R Documentation   |
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Cowles and Davis's Data on Volunteering
---------------------------------------

Description
~~~~~~~~~~~

The ``Cowles`` data frame has 1421 rows and 4 columns. These data come
from a study of the personality determinants of volunteering for
psychological research.

Usage
~~~~~

::

    Cowles

Format
~~~~~~

This data frame contains the following columns:

neuroticism
    scale from Eysenck personality inventory

extraversion
    scale from Eysenck personality inventory

sex
    a factor with levels: ``female``; ``male``

volunteer
    volunteeing, a factor with levels: ``no``; ``yes``

Source
~~~~~~

Cowles, M. and C. Davis (1987) The subject matter of psychology:
Volunteers. *British Journal of Social Psychology* **26**, 97â€“102.
