Why is the Drupal7 boolean field value not displayed?

Question

Drupal

Created several checkboxes. I bring them out through the view. Labels are created, lines are displayed, but I can not attach any value to the field. I tried through the material settings, field settings - it still displays an empty field. Even rewriting the value outputs a void. Hence the question: where could the output of the logical field break? And what to do in this situation?