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Measurement scale of perceived usefulness.
| Latent variables | Item code | Questionnaire content design | Source |
|---|---|---|---|
| Perceived usefulness | PU1 | Online learning platforms currently in use can improve children's learning results. | Davis [24] |
| PU2 | Online learning platforms are being used to meet the needs of children. | ||
| PU3 | Online learning platforms are being used to solve children's learning puzzles. |
