| Visibility rating | The mean numbers of each rating per subject | The total number of each response summed over all subjects | The ratio of the total number of each rating to the total number of all ratings for all subjects |

Picture version | 1 | 27 | 514 | 49.2% |

2 | 16 | 300 | 28.7% | |

3 | 10 | 182 | 17.4% | |

4 | 3 | 49 | 4.7% | |

Word version | 1 | 34 | 610 | 61.6% |

2 | 17 | 304 | 30.7% | |

3 | 4 | 73 | 7.4% | |

4 | 0 | 3 | 0.3% |