Comment vérifier et récupérer les input de type 'radio' ?

<form method="post" >
<font size="4">Remplissez le formulaire proposé par le coordinateur pour évaluer le dépôt</font>
</br></br>
<div class="wpst_evaluation">
    <p id="m">Originalité de la problématique</p>
    <ul class="wpsqt_multiple_evaluation" >
        <li>
            <input type="radio" name="answers[0][]" value="0" id="answer_1_0"  required='required'/> <label for="answer_1_0">0-0 - Faible</label>
        </li>
        <li>
            <input type="radio" name="answers[0][]" value="1" id="answer_1_1"  /> <label for="answer_1_1">2-1</label>
        </li>
        <li>
            <input type="radio" name="answers[0][]" value="2" id="answer_1_2"  /> <label for="answer_1_2">4-2</label>
        </li>
        <li>
            <input type="radio" name="answers[0][]" value="3" id="answer_1_3"  /> <label for="answer_1_3">6-3</label>
        </li>
        <li>
            <input type="radio" name="answers[0][]" value="4" id="answer_1_4"  /> <label for="answer_1_4">8-4</label>
        </li>
        <li>
            <input type="radio" name="answers[0][]" value="4" id="answer_1_4"  /> <label for="answer_1_4">10-5 - Excellent</label>
        </li>
    </ul>
 
</div>
 
 
<div class="wpst_evaluation">
    <p id="m">Cohérence et clarté de la structure d'ensemble</p>
    <ul class="wpsqt_multiple_evaluation">
        <li>
            <input type="radio" name="answers[1][]" value="0" id="answer_1_0"  required='required'/> <label for="answer_2_0">0-0 - Faible</label>
        </li>
        <li>
            <input type="radio" name="answers[1][]" value="1" id="answer_2_1"  /> <label for="answer_2_1">2-1</label>
        </li>
        <li>
            <input type="radio" name="answers[1][]" value="2" id="answer_2_2"  /> <label for="answer_2_2">4-2</label>
        </li>
        <li>
            <input type="radio" name="answers[1][]" value="3" id="answer_2_3"  /> <label for="answer_2_3">6-3</label>
        </li>
        <li>
            <input type="radio" name="answers[1][]" value="4" id="answer_2_4"  /> <label for="answer_2_4">8-4</label>
        </li>
        <li>
            <input type="radio" name="answers[1][]" value="5" id="answer_2_5"  /> <label for="answer_2_5">10-5 - Excellent</label>
        </li>
    </ul>
 
</div>
</form>