Experts on infant socioemotional development, such as jerome kagan, conclude that makes it unlikely that emotions which require thought can be experienced in the first year.

the structural immaturity of the infant brain

Explanation:

Jerome Kagan has provided a wide range of support in regards to infant socio-emotional development. The theorist has provided the concept of Behavioral inhibition (BI) and considers an important part of the socio-emotional development of children in early years. BI can also result in social anxiety disorders later on and defines the different temperaments of children in various environments and situations. He also states that the structural immaturity of the infant brain during the early years and especially the first year after birth makes it very unlikely that emotions which require the infant to think can be experienced or felt. Therefore, even if such an emotion is expressed then it might be a result of a spontaneous action rather than thinking.