| A | B |
| Scans surroundings when held upright | Intellectual |
| Utters guttural noises when content | Intellectual |
| Increasingly alert facial expressions | Intellectual |
| Follows movements with eyes | Intellectual |
| Turns head towards a light souce | Intellectual |
| Passive acceptance of routines | Intellectual |
| Stops whimpering at sound of a soothing human voice | Emotional |
| Startled by sudden noise | Emotional |
| Grasps finger when palm touched | Emotional |
| Cries lustily when hungry or uncomfortable | Emotional |
| Crying brings relief distress | Emotional |
| Feels secure when handled with love and confidence | Emotional |
| Gradually develops social smile | Social |
| Stops crying when picked up or spoken to | Social |
| Turns to regard nearby speaker's face | Social |
| Watches individual's fac during feeding | Social |
| Eye to eye contact from 2-3 weeks | Social |
| Expression still vague, responsive vocalisation at 5-6 weeks | Social |
| Movements dominated by primary reflexes | Physical |
| Steadily gains weight | Physical |
| Sleeps a large proportion of the time | Physical |
| Sucks well | Physical |
| Need's regular milk feeds | Physical |
| Head falls loosely unless supported | Physical |