&#39;ddm&#39;,
 &#39;params&#39;: [&#39;v&#39;, &#39;a&#39;, &#39;z&#39;, &#39;t&#39;],
 &#39;param_bounds&#39;: [[-3.0, 0.3, 0.1, 0.0], [3.0, 2.5, 0.9, 2.0]],
 &#39;boundary&#39;: &lt;function ssms.basic_simulators.boundary_functions.constant(t=0)&gt;,
 &#39;n_params&#39;: 4,
 &#39;default_params&#39;: [0.0, 1.0, 0.5, 0.001],
 &#39;hddm_include&#39;: [&#39;z&#39;],
 &#39;nchoices&#39;: 2}
</code></pre></div>
<p><strong>Note:</strong>
The usual structure of these models includes,</p>
<ul>
<li>Parameter name