Final answer:
Babies have a full range of basic emotions during their first year of life, according to research by Paul Ekman. By 6 weeks, infants start smiling and making vocal sounds. By 12 months, they may say their first words and can stand with help or even walk.
Step-by-step explanation:
Babies start to have a full range of basic emotions, including anger, joy, surprise, sadness, disgust, fear, and interest, during the first year of their life. By 6 weeks, infants start smiling and making vocal sounds. By 6 months, they are babbling and can sit and crawl. By 12 months, they may say their first words and can stand with help or even walk.
According to research by Paul Ekman, there are seven universal emotions that are associated with distinct facial expressions, including happiness, surprise, sadness, fright, disgust, contempt, and anger.