| Mothers | Age | Mother’s education | Mother’s employment | Family monthly income | |
| High SES | 1 | 33 | Master’s degree | instructor | more than 3000 TL ($1050) |
| 2 | 34 | Master’s degree | instructor | more than 3000 TL ($1050) | |
| 3 | 34 | College graduate | instructor | more than 3000 TL ($1050) | |
| 4 | 35 | College graduate | instructor | more than 3000 TL ($1050) | |
| 5 | 36 | Master’s degree | food engineer | more than 3000 TL ($1050) | |
| Low SES | 1 | 30 | Primary school graduate | housewife | less than 1000 TL ($350) |
| 2 | 32 | Primary school graduate | housewife | less than 1000 TL ($350) | |
| 3 | 36 | Primary school graduate | housewife | less than 1000 TL ($350) | |
| 4 | 39 | Secondary school graduate | housewife | less than 1000 TL ($350) | |
| 5 | 40 | Primary school graduate | housewife | less than 1000 TL ($350) | |