Recently, learning technologies have become a pivotal constituent of teaching-learning processes. Contemporary studies indicate that in order to effectively utilize these technologies, instructors and learners alike must master a range of cognitive and socio-emotional competencies, commonly termed "digital literacy competencies" or "21st century skills." This study employs a content analysis methodology to trace trends of change in the research of core digital literacy competencies as reflected in the educational academic literature of the past 37 years (1980-2016). Based on well-established frameworks of digital literacy competencies, this research examined seven skills: Collaboration, Communication, Creativity, Critical thinking, Information literacy, Problem-solving and Socio-emotional skills. Data were collected through advanced search queries of peer-reviewed publications in the Education Resources Information Center (ERIC) database. Findings reveal that among the examined terms, "Communication" is the most prominent digital literacy skill, followed by "Problem Solving" and "Collaboration." Furthermore, within the context of "Skills," the most prominent terms are "Information Literacy" and "Critical thinking"; "Technology" and "Collaboration" are least mentioned. Our findings suggest that awareness of digital learning competencies in educational research literature is marginal, implying that educational research seems to lag behind the need to understand the ever-changing digital competencies that instructors and learners need.