Change author box title text in Genesis

gistfile1.php

<?php
/**
 * Change "About" text in author box titles for single posts
 *
 * @since 1.0.0
 * @param string $title
 * @param string $context
 * @return string
 */
function ja_author_box_title( $title, $context ) {
	if ( 'single' == $context ) {
		$title = str_replace( 'About', 'Written by', $title );
	}
	return $title;
}
add_filter( 'genesis_author_box_title', 'ja_author_box_title', 10, 2);