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<table width="100%" summary="page for Dwyer"><tr><td>Dwyer</td><td align="right">R Documentation</td></tr></table>

<h2>8 cognitive variables used by Dwyer for an example.
</h2>

<h3>Description</h3>

<p>Dwyer (1937) introduced a technique for factor extension and used 8 cognitive variables from Thurstone.  This is the example data set used in his paper.
</p>


<h3>Usage</h3>

<pre>data(Dwyer)</pre>


<h3>Format</h3>


<p>The format is:
num [1:8, 1:8] 1 0.58 -0.28 0.01 0.36 0.38 0.61 0.15 0.58 1 ...
- attr(*, &quot;dimnames&quot;)=List of 2
..$ : chr [1:8] &quot;V1&quot; &quot;V2&quot; &quot;V3&quot; &quot;V4&quot; ...
..$ : chr [1:8] &quot;V1&quot; &quot;V2&quot; &quot;V3&quot; &quot;V4&quot; ...
</p>


<h3>Source</h3>

<p>Data matrix retyped from the original publication. 
</p>


<h3>References</h3>

<p>Dwyer, Paul S. (1937), The determination of the factor loadings of a given test from the known factor loadings of other tests. Psychometrika, 3, 173-178
</p>


<h3>Examples</h3>

<pre>
data(Dwyer)
Ro &lt;- Dwyer[1:7,1:7]
Roe &lt;- Dwyer[1:7,8]
fo &lt;- fa(Ro,2,rotate="none")
fa.extension(Roe,fo)
</pre>


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