Gutiérrez de Polini's Readability Formula to Score Spanish Texts

Gutiérrez de Polini's Readability Formula (**Fórmula de Comprensibilidad de Gutiérrez de Polini)**, created by Luisa Elena Gutiérrez de Polini, is an original formula to score the readability of Spanish text. The formula counts syllables, words, and sentences and outputs a score that correlates with a reading scale.
The formula is as follows:

Gutiérrez de Polini published the formula in a thesis titled "Investigación sobre lectura en Venezuela" and presented it at the "Primeras Jornadas de Educación Primaria" in Caracas, Venezuela, in 1972, under the auspices of the Ministry of Education.

I couldn't find the formula's readability scale so I created this one, which aligns with common "reading ease" and "reading difficulty" results of other formulas.

Gutiérrez de Polini originally developed the formula to score texts up to 6th grade, but the above table projects the results beyond the original data.

$$ \text{G Score} = 95.2 - 9.7 \times \frac{C}{W} - 0.35 \times \frac{W}{Snt} $$

**C**is the total number of syllables in the text**W**is the total number of words,**Snt**is the total number of sentences.

Gutiérrez de Polini published the formula in a thesis titled "Investigación sobre lectura en Venezuela" and presented it at the "Primeras Jornadas de Educación Primaria" in Caracas, Venezuela, in 1972, under the auspices of the Ministry of Education.

I couldn't find the formula's readability scale so I created this one, which aligns with common "reading ease" and "reading difficulty" results of other formulas.

Gutierrez Interpretation | English Grade | Age Range | G Score Range | Spanish Grade |
---|---|---|---|---|

Very Difficult | College and Above | 19+ year olds | <= 20 | Universidad y superior |

Difficult | 11th - 12th Grade | 16-18 year olds | <= 33 | 1º - 2º Bachillerato |

Slightly Difficult | 9th - 10th Grade | 14-16 year olds | <= 40 | 3º - 4º ESO |

Average | 7th - 8th Grade | 12-14 year olds | <= 50 | 1º - 2º ESO |

Slightly Easy | 5th - 6th Grade | 10-11 year olds | <= 60 | 5º - 6º Primaria |

Easy | 3rd - 4th Grade | 8-9 year olds | <= 70 | 3º - 4º Primaria |

Very Easy | 1st - 2nd Grade | 6-7 year olds | > 70 | 1º - 2º Primaria |

Gutiérrez de Polini originally developed the formula to score texts up to 6th grade, but the above table projects the results beyond the original data.

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