Final answer:
From birth to 7 months, infants typically display emotions like happiness, evident in their smiles, and fear, observable as stranger anxiety. The seven universal emotions are happiness, surprise, sadness, fear, disgust, contempt, and anger, and are universally recognized through facial expressions.
Step-by-step explanation:
The emotions that an infant typically experiences from birth to 7 months old include happiness and fear. Happiness can be seen through a baby's first smile, which is considered an important milestone in infant development. Fear, on the other hand, is often observed in the form of stranger anxiety, which is a fear of unfamiliar people that infants commonly begin to exhibit around the time they develop object permanence.
According to researcher Paul Ekman's extensive work on human emotions and facial expressions, there are seven universal emotions, which include happiness, surprise, sadness, fear, disgust, contempt, and anger. These emotions are associated with distinct facial expressions that are universally recognized, regardless of cultural differences. For infants, primary emotions such as happiness and fear are more prominent, whereas emotions like contempt and anger may develop later.