“Desirable” Difficulty
Podsie questions should have an appropriate level of difficulty
Because a question will repeatedly show up in a student's Personal Deck, it's important to write questions that assess a student's knowledge of the underlying content, rather than assessing how good a student is at memorizing the answers to a question. Therefore, we highly recommend that you write questions that are at an acceptable level of “Desirable Difficulty”.
For example, let's consider the following multiple choice question:
To strengthen a hurricane you want ________ waters/temperatures.
A. Warm
B. Cold
For this question, students could guess their way into a correct answer without actually understanding the underlying principles. In general, you want to avoid questions that only have two acceptable answers (eg. True/False questions).
Here would be a much better version of that same question:
Which of these are true about hurricanes? (SELECT ALL THAT APPLY)
A. Cold waters strengthen a hurricane because at lower temperatures, the
pressure rises for the storm.
B. Warm waters strengthen a hurricane because the storm passes its energy
into the ocean.
C. Warm waters strengthen a hurricane because the storm sucks up heat energy
from the water.
D. Cold waters strengthen a hurricane because the cold causes the storm
molecules to start vibrating with greater intensity.