Two study groups and an untested causal claim

A fictional psychology class compares two revision groups. Students choose which group to join. Group A uses a newflashcard application in the morning with a teacher who gives frequent feedback. Group B uses printed not es in the afternoon with a different teacher. After a week, Group A has a higher average score on a class test. The report states that the application alone caused the difference and must therefore work better for every student. No baseline performance, random assignment, attendance pattern or comparable feedback record is provided. The task asks students to identify what the comparison shows and what remains uncertain. It does not ask for a realproduct recommendation or claim that using technology is inherently better or worse than printed material. All groups, materials andresults are invented for this methods exercise.