Glossary of Terms for Distractor Statistics NumberChoosingResponse The number of people choosing a specified response or getting a specified code. Equal to the number of individuals that selected the response option. This can also be used for the number of individuals that received a certain rating on a judged item such as an essay question. PercentChoosingResponse The percent of people choosing a specified response or getting a specified code. Equal to the percent of test-takers that selected the response option. This can also be used for the percent of individuals that received a certain rating on a judged item such as an essay question. Fifths_Table_Lowest Fifths_Table_Lowest Count of examinees in the lowest fifth of the test score distribution who selected the specified option. Fifths_Table_Second_Lowest Fifths_Table_Second_Lowest Count of examinees in the second lowest fifth of the test score distribution who selected the specified option. Fifths_Table_Middle Fifths_Table_Middle Count of examinees in the middle fifth of the test score distribution who selected the specified option. Fifths_Table_Second_Highest Fifths_Table_Second_Highest Count of examinees in the second highest fifth of the test score distribution who selected the specified option. Fifths_Table_Highest Fifths_Table_Highest Count of examinees in the highest fifth of the test score distribution who selected the specified option. AIS-Response Average Item Score for Response Equal to the mean of the item scores for the group of individuals that selected the response option. PTbis-Response r-pointbiserial for Response A group-dependent measure of the discrimination of the response option, the pointbiserial correlation between selection of the response option and a criterion such as the total score on the test.