6. Collected data via triangulation
- EPPE
- Di Lalla
- Shea
7. Concluded day care does not cause aggression and increases pro-social behaviour
- EPPE
- Di Lalla
- Shea
8. Concluded day care does not cause aggression and makes them more sociable with peers
- Shea
- Di Lalla
- EPPE
9. Used a naturalistic observation with high ecological validity and inter-rater reliability
- EPPE
- Shea
- Di Lalla
10. Assessed over 3000 children who were in various types of day care from the age of 3-7
- EPPE
- Shea
- Di lalla
