This study is a review of 34 empirical studies internationally and in Greece from 2008-2018 and aims at investigating:a. the implementation of student self-assessment in Higher education and the outcomes on students, b. the ability ofstudents to self-assess accurately and the factors that affect this ability. According to the main findings, self-assessmentis implemented through various ways that include inter alia electronic and non-electronic self-assessment tools.Internationally, most studies have examined and proved the contribution of student self-assessment to improvement ofperformance and learning. Moreover, self-assessment develops self-regulating learning, increases self-confidence,motivates students to ask guidance from their professors and help from their peers, increases self-efficacy, students’awareness of self-assessment ability and self-control, makes students change attitudes towards course, preparesemployability skills of students, reduces anxiety for assessment, increases students’ responsibility about theirlearning, makes them have a critical view on their work and develops critical thinking skills. In Greece, it was foundonly one study that examined the implementation of student self-assessment in Higher education and its impact onstudents and findings indicate that self-assessment through a quiz improves performance, self-regulation, motivatesstudents to try more and helps them identify gaps in their learning. Student self-assessment ability and factors thataffect this ability have been examined only internationally, so in Greece there is a research gap concerning theseparameters. Tertiary students can self-assess accurately and this ability depends on specific factors such asconfidence, prior achievement, learning style, scaffolding from professors, training, dialogical interaction anddynamic assessment.