Dataset from an exploring intercultural skill development dynamic among Indonesian undergraduate students

This dataset was generated from open-ended questionnaires and interviews aimed at identifying the definitions and factors of intercultural skills according to Javanese students (as local students) and Sumbanese students (as migrant students). The open-ended questionnaire was completed by 228 Sumbanese students and 35 Javanese students from February 19, 2026, to April 12, 2026. Meanwhile, the semi-structured interviews involved four students from each group from April 13, 2026, to May 10, 2026. Note. The source of questionnaire responses, interview conversations, and observational notes cited in our article is formatted as PS[Sumbanese participant number], PJ[Javanese participant number], and Obs.Lap[observation date].