Why does a child sometimes make the same small “careless mistake” in arithmetic even when they know the method—a missed carry, an incorrect borrow, a copied digit, or a skipped step?
Primary 3 and Primary 4 children are invited to take part in an HKSYU Master’s research study, Working Memory and Attention Errors in Arithmetic (research approval code: PSY509_25P510M_CCYJ_2026). This is not a school examination or an intelligence test. The study explores why small but repeated errors may appear during familiar column-form addition, subtraction, multiplication and division.
The online session takes approximately 38 minutes and includes two short number activities followed by column-form arithmetic. There are no word problems and no separate Chinese and English arithmetic sets. Registration and parental consent are required; the activities and analysis use a participant code. Names, schools and identifying details will not appear in research reports.
Participation is voluntary.
Research introduction: https://moodle.hk/introduction.htmlFor students who already have a Moodle account
You do not need to create another account or wait for a separate invitation code. Please log in using your existing Moodle account and complete the short registration page together with a parent or guardian. Eligible existing students will receive a participant code and seat number immediately.For families without a Moodle account
- If you have an invitation code, please click here. (and fill in the code).
- If you do NOT have an invitation code,
- but you have a child school email (ending with "edu.hk"), please click here. (and get the code from email)
- and you do not have a child school email (ending with "edu.hk"), please click here or "Whatsapp" Mr. James Chan.