Boik

Data set based on the hypothetical example used by R.J. Boik (1979) to explain the analysis of interaction contrasts. It represents the electrodermal response of 72 students complaining of hemophobia, treated with different fear reduction therapies and doses of antianxiety medication, in a balanced factorial design. The observed values of the dependent variable (not given in the original article) are contrived so that the results of all the tests are coherent with the examples.

datasets

Analysis of terms in linear, generalized and mixed linear models,
on the basis of multiple comparisons of factor contrasts.  Specially suited
for the analysis of interaction terms.

Helios De Rosario

phia

Post-Hoc Interaction Analysis

Helios De Rosario-Martinez

John Fox

R Core Team 

Chalmers Phil

Boik function

A data frame with 72 observations and three columns:<dl>
<dt><code>therapy</code></dt>
<dd>Fear reduction therapy. Factor with levels <code>control</code>, <code>T1</code>, <code>T2</code>.</dd><dt><code>medication</code></dt>
<dd>Dose of antianxiety medication. Ordered factor with levels <code>placebo</code>, <code>D1</code>, <code>D2</code>, <code>D3</code>.</dd><dt><code>edr</code></dt>
<dd>Electrodermal response (in arbitrary units).</dd>
</dl>

Format

Contrived Data of Treatments for Hemophobia — Boik

A data frame with 72 observations and three columns:<dl>
<dt><code>therapy</code></dt>
<dd>Fear reduction therapy. Factor with levels <code>control</code>, <code>T1</code>, <code>T2</code>.</dd>

<dt><code>medication</code></dt>
<dd>Dose of antianxiety medication. Ordered factor with levels <code>placebo</code>, <code>D1</code>, <code>D2</code>, <code>D3</code>.</dd>

<dt><code>edr</code></dt>
<dd>Electrodermal response (in arbitrary units).</dd>


</dl>

Boik: Contrived Data of Treatments for Hemophobia

Description

Usage

Arguments

Format