How to Use Formulas with Google Form Responses in Sheets

How to Get the Quiz Score in Google Forms with Apps Script

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Teachers can easily create an online quiz using Google Forms and students can view their test scores immediately after form submission.

Published in: Google Apps Script – Google Forms

Teachers can use Google Forms to create an online quiz and students can view their test scores immediately after form submission. With Apps Script, you can set up automatic email notifications and send quiz scores to parents after a student has taken the quiz.

Here’s a sample Google Script that will iterate through every answer in the most recent Google Form response and log the max score (points) of a gradable question and the score for the respondent’s submitted answer.

function getGoogleFormQuizScore() {

  
  var form = FormApp.getActiveForm();

  
  var response = form.getResponses().reverse()[0];

  
  var items = form.getItems();

  for (var i=0; i<items.length; i++) {

    var question = items[i];

    
    var qTitle = question.getTitle();

    
    var qType = question.getType();

    
    var responseForItem = response.getResponseForItem(question)

    
    var answer = responseForItem ? responseForItem.getResponse() : null;

    var item = castQuizItem_(question, qType);

    
    
    

    if (item && typeof item.getPoints === "function") {

      var maxScore = item.getPoints();
      var gradableResponseForItem = response.getGradableResponseForItem(question);
      var score = gradableResponseForItem.getScore();

      Logger.log(String(qType), qTitle, answer, maxScore, score);

    }
  }
}

The Google Forms API can only return scores for Multiple Choice, Dropdown and Checkbox style questions. It cannot provide scores for the grid type of questions where the item is presented as a grid of rows and columns.

Checkbox Grid – A question item that allows the respondent to select multiple choices per row from a sequence of checkboxes.
Choice Grid – A question item that allows the respondent to select one choice per row from a sequence of radio buttons.

function castQuizItem_(item, itemType) {
  if (itemType === FormApp.ItemType.CHECKBOX) {
    return item.asCheckboxItem();
  }
  if (itemType === FormApp.ItemType.DATE) {
    return item.asDateItem();
  }
  if (itemType === FormApp.ItemType.DATETIME) {
    return item.asDateTimeItem();
  }
  if (itemType === FormApp.ItemType.DURATION) {
    return item.asDurationItem();
  }
  if (itemType === FormApp.ItemType.LIST) {
    return item.asListItem();
  }
  if (itemType === FormApp.ItemType.MULTIPLE_CHOICE) {
    return item.asMultipleChoiceItem();
  }
  if (itemType === FormApp.ItemType.PARAGRAPH_TEXT) {
    return item.asParagraphTextItem();
  }
  if (itemType === FormApp.ItemType.SCALE) {
    return item.asScaleItem();
  }
  if (itemType === FormApp.ItemType.TEXT) {
    return item.asTextItem();
  }
  if (itemType === FormApp.ItemType.TIME) {
    return item.asTimeItem();
  }
  if (itemType === FormApp.ItemType.GRID) {
    return item.asGridItem();
  }
  if (itemType === FormApp.ItemType.CHECKBOX_GRID) {
    return item.asCheckboxGridItem();
  }
  if (itemType === FormApp.ItemType.PAGE_BREAK) {
    return item.asPageBreakItem();
  }
  if (itemType === FormApp.ItemType.SECTION_HEADER) {
    return item.asSectionHeaderItem();
  }
  if (itemType === FormApp.ItemType.VIDEO) {
    return item.asVideoItem();
  }
  if (itemType === FormApp.ItemType.IMAGE) {
    return item.asImageItem();
  }
  return null;
}