ZipGrade may be used with many different types of multiple-choice questions (in addition to numeric responses). For example:
- Standard single-choice questions
- Matching questions or large answer set questions with combination letters for each choice
- Select-All-That-Apply-Style questions
To provide maximum flexibility and accommodate all types of questions, ZipGrade allows alternative answers for each question. Each primary or alternate question consists of ALL of the letters that the student should darken to receive credit for that answer. In this way, each possible combination of letters is a distinctly different answer. 'A', 'B', and 'AB' are 3 completely different responses. For a 5-answer-choice question, there are 32 distinct answers possible. Therefore, there are 32 distinct alternate answers possible to define.
Manually Enter Alternate Answer(s) on Mobile App:
- After opening the quiz, press the 'Edit Key' button
- Scroll to the question of interest
- Press the '(i)' button on the right to bring up the details.
- Use the 'Add' button in the upper-right to add an additional alternate answer
- Enter the 'Answer' and 'Point Value' to award the student if they provide this response for this question. Repeat for all alternate answers.
- Press the back button (upper-left) to return to the 'Edit Key' screen
Manually Enter Alternate Answer(s) on the ZipGrade.com website:
- Log in to ZipGrade.com with your ZipGrade account.
- On the 'Quizzes' tab, select the quiz of interest
- Press the 'Edit Answer Keys' button
- Scroll to the question of interest
- Press the '+ Answer' button on that question's row to add an additional alternate answer
- Enter the 'Answer' and 'Point Value' to award the student if they provide this response for this question. Repeat for all alternate answers.
- Press the 'Save Key' button to save the updates for this key. No data is saved until the 'Save Key' button is pressed.
Use the Partial Credit Wizard on the ZipGrade.com website:
- Log in to ZipGrade.com with your ZipGrade account
- On the 'Quizzes' tab, select the quiz of interest
- Press the 'Edit Answer Keys' button
- Scroll to the question of interest
- Enter the primary answer and point value into the first row of this question.
- Press the 'Partial' button to bring up the 'Partial Credit Wizard' for this question
- Select the 'Partial Credit Method' (more info below)
- Select all possible answer choices for this question. This is used if using a standard answer sheet with more answer choices than the question requires. For example, a 4-max-choice question using a 5-choice physical answer sheet.
Partial Credit Wizard
For Select-All-That-Apply-Style questions where you wish to award partial credit for some responses, the Partial Credit Wizard will automatically generate the list of alternate answers for that question. Once the alternate answers are generated, you may alter or remove those alternate answers.
If you change the primary answer for the question after running the Partial Credit Wizard, you will need to run the wizard again to generate the updated list of alternate answers.
The wizard will use the primary answer entered on the main 'Edit Key' screen. Press the 'Partial' button on the 'Edit Key' screen to bring up the wizard interface.
Enter the 'Partial Credit Method' and the 'Possible Answer Choices' and then press 'Generate Alternate Answers'. The wizard will replace all existing alternate answer for this question with the newly genreated ones.
Partial Credit Method #1: Standard
The standard method is the equivalent of viewing the answer choices as a collection of true/false responses. Students are given credit for correctly selected responses and correctly omitted responses equally.
Standard scoring is useful when you want to reward both correct selections and omissions equally.
Note that a student who leaves a question completed blank will receive some credit.
Standard Formula = (correctly selected + correctly omitted) / (number of possible letters) * (Point Value)
Example 1A:
- Primary Answer On Key: ABC (on a 5-choice answer sheet question) worth 1 point
- Student Sample 1:
- Student Response: AB
- Correctly selected 2 (AB) and correctly omitted 2 (DE)
- Score: (2 correctly selected + 2 correctly omitted) / 5 * 1 point = 0.8 points
- Student Sample 2:
- Student Response: CD
- Correct selected 1 (C) and correctly omitted 1 (E)
- Score: (1 correctly selected and 1 correctly omitted) / 5 * 1 point = 0.4 points
Partial Credit Method #2: Proportional
Proportional scoring includes a greater penalty for incorrect selections. Unlike the 'standard' method, leaving a question blank will not award any points. This method punished overselection from guessing.
This method awards points for correct selections and deducts points for incorrect ones.
Proportional Formula = (Correctly Selected / Size of Full Correct Answer) * (1 - Incorrect Selected / Size of Full Incorrect Answer) * (Point Value)
Example 2A:
- Primary Answer On Key: BCD (on a 5-choice answer sheet question) worth 1 point
- Student Sample 1:
- Student Response: BC
- Correctly selected 2 (BC) and incorrectly selected 0
- Score: (2 correctly selected / 3 Full Correct Answer) (1 - 0 Incorrectly Selected/2 Fully incorrect answer ) 1 = (0.66) * (1.0) * (1.0) = 0.66 points
- Student Sample 2:
- Student Response: CE
- Correct selected 1 (C) and incorrectly selected 1 (E)
- Score: (1 correctly selected / 3 Full Correct Answer) (1 - 1 Incorrectly Selected/2 Fully incorrect answer ) 1 = (0.33) * (0.5) * (1.0) = 0.17 points