Developmental Stages Matrix
|Developmental Stage |Physical changes |Cognitive changes |Socioemotional changes |
|Infancy |Body weight doubles by the fourth month after birth and| |Crying and contentment |
| |triples by their first birthday. |Sensory motor intelligence begins with six stages of |Smiling socially. |
| |Height increases by a foot in first two years. |infant learning. |Laughter and feeling happy |
| |Sleep becomes regular with dreaming decreasing. |Infants use their sensory and motor skills to adapt to |Responsive facial expressions such as full smiles. |
| |Sleep patterns emerge. |the world around them. |Fear of sounds, and unexpected things such as animals, or |
| |Sensory motor skills develop. |Object learning and understanding starts. |dogs. |
| |Reflexes develop. |Information processing begins. |Self awareness begins. |
| |Brain development begins in the motor cortex. |Depth perception or perception processing. |More emotional expressions