how to display a boolean values in twig

in this table i want to display in the "reponse" field "yes" or "no" instead of "1" and " " this is the picture show my table : this picture shows my table :

i'm using symfony2.8,in my entity "typeQuestion" i have this :

/**
 * @var boolean
 * @ORM\Column(name="reponse", type="boolean")
 */

private $reponse;


/**
 * Set reponse
 *
 * @param boolean $reponse
 * @return TypeQuestion
 */
public function setReponse($reponse)
{
    $this->reponse = $reponse;

    return $this;
}

/**
 * Get reponse
 *
 * @return boolean 
 */
public function getReponse()
{
    return $this->reponse;
}
 public function __toString() {
    return $this->libelle;
}

}

in the form i have:

 ->add('reponse', 'choice', array(
                'label' => 'Reponse',
                'choices' => array("true" => 'Oui', false => 'Non'),
                'expanded' => true,
                'multiple' => false,
                'required' => true
            ));
}

and i have this in my view:

 <td class="center">{{TypeQuestion.libelle}}</td>
<td class="center">{{TypeQuestion.description}}</td> 
<td class="center">{{TypeQuestion.reponse}}</td> 

in phpmyadmin this is what i get : in phpmyadmin this is what i get :2

You can add if statement {% if TypeQuestion.reponse %}yes{% else %}no{% endif%}