Which of the following is NOT considered a major domain of learning ?

The correct option is Socio-cultural.

Explanation:
In educational psychology, learning objectives are broadly classified into three primary areas known as the major domains of learning (popularized by Benjamin Bloom and his colleagues in Bloom's Taxonomy):

1. Cognitive Domain: Deals with mental skills, knowledge acquisition, intellectual development, critical thinking, and problem-solving capabilities.
2. Affective Domain: Deals with emotional growth, feelings, attitudes, motivations, values, and appreciations.
3. Psychomotor Domain: Deals with physical skills, bodily coordination, motor movements, and hands-on operational abilities.

While Socio-cultural factors describe an environment or perspective that influences learning (such as in Lev Vygotsky's sociocultural theory of cognitive development), socio-cultural is NOT considered one of the core domains of learning objectives itself.