How to Build a Habit Tracker With AI Quiz

Answers and explanations appear as you take the quiz.

1. A coworker insists habits form in exactly 21 days. Where does the guide say that number usually comes from?
   • Maxwell Maltz's 1960 book Psycho-Cybernetics
   • A 2010 University College London study
   • James Clear's habit research lab
   • Google Sheets' default streak template
2. What did the study by Phillippa Lally and colleagues find about how long behaviors take to become automatic?
   • Exactly 21 days for everyone
   • A median of about 66 days, ranging from 18 to 254 days
   • Seven days if tracked in a spreadsheet
   • One year for all habits
3. Which of these is an implementation intention as the guide describes it?
   • I want to be healthier this year
   • I will track ten habits every day
   • After I pour my morning coffee, I will write one sentence
   • I will write whenever I feel inspired
4. You miss one day of your new reading habit. What did the Lally study find about single missed days?
   • They reset habit formation to day zero
   • They double the time needed
   • They make the habit permanently harder
   • They did not meaningfully derail progress
5. In a wide Google Sheet where cells B2 to B8 hold checkboxes for one habit over a week, which formula gives the completion rate?
   • =SUM(B2:B8)*7
   • =COUNTIF(B2:B8,TRUE)/7
   • =AVERAGE(A2:A8)
   • =COUNTA(B2:B8)
6. According to the guide, what is the advantage of a long data format, with one row per date and habit?
   • It is easiest to analyze and export
   • It is fastest to fill in by hand
   • It removes the need for checkboxes
   • It hides missed days
7. Why does the guide advise asking the AI to state the numbers it computed, or to use its code or data analysis tool, during a weekly review?
   • Because spreadsheets cannot store TRUE values
   • Because AI tools charge per number
   • Because it hides personal data
   • Because language models can miscount when tallying in prose
8. A person's weekly AI review suggests five changes at once. What does the guide recommend instead?
   • Apply all five and add more habits
   • Stop reviewing weekly
   • Ask for one change for next week
   • Switch from a spreadsheet to a notes app