Interpersonal variables and their impact on the perceived validity of peer assessment in engineering PBL

Intra-team peer assessments have become the norm for performance and attribute assessment in problem and project based learning activities. However, research on the effects of interpersonal variables on these assessment practices is limited. This study examined the relationship between interpersonal variables and student perceptions on the validity of peer assessment. In order to understand the relationship between social interaction and its effects on peer assessment, four interpersonal variables were identified in this study: psychological safety, value diversity, interdependence, and trust. Fifty five undergraduate engineering students working in teams of 5 to 6 participated in a survey after having completed their first formative peer assessment. Preliminary findings from this study and evidence from other studies support the view that interpersonal variables have the potential to affect peer assessment and influence the learning outcomes