This article focuses on reliability in assessment of prior learning (APL) related to higher education. APL refers to a process where adults’ prior learning, formal as well as informal, is assessed and acknowledged. In higher education, APL is used for the purpose of gaining admission,
advanced standing or credits. In this article, studies investigating reliability in APL are presented. The studies provide data of inter- and intrarater reliability among assessors in a specific APL scheme used in higher education. Percentage of agreement and Cohen’s kappa were used
to estimate reliability, and the results show that the agreement between assessors, i.e. interrater reliability, is poorer compared to the agreement on repeated assessment by the same assessor, i.e. intrarater reliability. Further, the results reveal that there are differences in agreement
between different aspects of prior learning. A conclusion is that reliability in this type of assessment ought to be further investigated.