| A | B |
|---|
| Shows signs of almost all basic emotions | Emotional |
| Social smile and laughter emerge | Emotional |
| Stranger anxiety and separation anxiety appear | Emotional |
| Indpendent behaviours increase with parental encouragement | Emotional |
| Shows attachment to familiar carers | Emotional |
| Ability to relate to playmates emerges by end of period | Emotional |
| Gradual control over bladder and bowel movements | Social |
| Imitates simple everyday activities, such as feeding doll | Social |
| Becomes more independent in dressing/undressing | Social |
| Plays contentedly near other children but not with them | Social |
| Defends own possessions with determination | Social |
| Resentful of attention shown to other children | Emotional |
| Newborn reflexes gradually reduce | Physical |
| Body doubles in height and quadruples in weight | Physical |
| Sleep organised into a day/night, the hours spent sleeping gradually reduce | Physical |
| Gradually develops motor skills for movement (sitting, crawling) | Physical |
| Vision and hearing develop quickly | Physical |
| Runs well, stops and starts safely by 2 years | Physical |
| Imitates adult facial expressions | Intellectual |
| Begins to use recognisable words and puts them into short sentences | Intellectual |
| Improved memory for people, places and objects | Intellectual |
| Behaviour is intentional | Intellectual |
| Capable of understanding more than they can say | Intellectual |
| Attention becomes more focussed and efficient | Intellectual |
