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update Groves notebook with author name
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2017/Contributed-Talks/06_groves/IRT simulation notebook.html

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<!DOCTYPE html>
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<title>IRT simulation notebook FINAL</title>
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<title>IRT simulation notebook FINAL - name added</title>
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<h1 id="How-to-test-IRT-models-using-simulated-data">How to test IRT models using simulated data<a class="anchor-link" href="#How-to-test-IRT-models-using-simulated-data">&#182;</a></h1><p>Football Radar is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is.</p>
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<h1 id="Teddy-Groves">Teddy Groves<a class="anchor-link" href="#Teddy-Groves">&#182;</a></h1><h1 id="How-to-test-IRT-models-using-simulated-data">How to test IRT models using simulated data<a class="anchor-link" href="#How-to-test-IRT-models-using-simulated-data">&#182;</a></h1><p>My company, <a href="https://www.footballradar.com/">Football Radar</a>, is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is.</p>
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<p>Specifically, we look at data encoding judgements by football scouts as to how well players perform different kinds of action, such as controlling a fast-moving ball under pressure from an opponent. Typically not all players attempt the same kinds of actions the same number of times. In these cases IRT models can be used to draw conclusions about the players' abilities and the tasks' difficulties.</p>
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<p>This notebook explains how to code some IRT models using Stan and test whether they can recover input parameters when given simulated data.</p>
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<h2 id="What-are-IRT-models?">What are IRT models?<a class="anchor-link" href="#What-are-IRT-models?">&#182;</a></h2><p>The acronym IRT stands for 'item response theory'. This kind of model and its generalisations are very well explained in Gelman and Hill (2006).</p>

2017/Contributed-Talks/06_groves/IRT simulation notebook.ipynb

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"cell_type": "markdown",
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"# Teddy Groves\n",
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"# How to test IRT models using simulated data\n",
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"\n",
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"Football Radar is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is. \n",
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"My company, [Football Radar](https://www.footballradar.com/), is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is. \n",
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"\n",
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"Specifically, we look at data encoding judgements by football scouts as to how well players perform different kinds of action, such as controlling a fast-moving ball under pressure from an opponent. Typically not all players attempt the same kinds of actions the same number of times. In these cases IRT models can be used to draw conclusions about the players' abilities and the tasks' difficulties. \n",
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2017/Contributed-Talks/06_groves/IRT simulation notebook.py

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# # Teddy Groves
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# # How to test IRT models using simulated data
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#
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# Football Radar is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is.
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# My company, [Football Radar](https://www.footballradar.com/), is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is.
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#
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# Specifically, we look at data encoding judgements by football scouts as to how well players perform different kinds of action, such as controlling a fast-moving ball under pressure from an opponent. Typically not all players attempt the same kinds of actions the same number of times. In these cases IRT models can be used to draw conclusions about the players' abilities and the tasks' difficulties.
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#

2017/Contributed-Talks/06_groves/correction_notes_and_bio_teddy_groves.txt

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2017/Contributed-Talks/slides/06_groves_stancon_slides.html

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<!DOCTYPE html>
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<title>IRT simulation notebook FINAL</title>
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<title>IRT simulation notebook FINAL - name added</title>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.1.10/require.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
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<h1 id="How-to-test-IRT-models-using-simulated-data">How to test IRT models using simulated data<a class="anchor-link" href="#How-to-test-IRT-models-using-simulated-data">&#182;</a></h1><p>Football Radar is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is.</p>
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<h1 id="Teddy-Groves">Teddy Groves<a class="anchor-link" href="#Teddy-Groves">&#182;</a></h1><h1 id="How-to-test-IRT-models-using-simulated-data">How to test IRT models using simulated data<a class="anchor-link" href="#How-to-test-IRT-models-using-simulated-data">&#182;</a></h1><p>My company, <a href="https://www.footballradar.com/">Football Radar</a>, is interested in lots of tasks that can be performed better or worse, depending on how hard it is and how able the agent doing it is.</p>
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<p>Specifically, we look at data encoding judgements by football scouts as to how well players perform different kinds of action, such as controlling a fast-moving ball under pressure from an opponent. Typically not all players attempt the same kinds of actions the same number of times. In these cases IRT models can be used to draw conclusions about the players' abilities and the tasks' difficulties.</p>
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<p>This notebook explains how to code some IRT models using Stan and test whether they can recover input parameters when given simulated data.</p>
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<h2 id="What-are-IRT-models?">What are IRT models?<a class="anchor-link" href="#What-are-IRT-models?">&#182;</a></h2><p>The acronym IRT stands for 'item response theory'. This kind of model and its generalisations are very well explained in Gelman and Hill (2006).</p>

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