Advances in artificial intelligence and robotic technologies have accelerated the proliferation of social robots in fields requiring direct human interaction, such as healthcare, education, and the service sector. Human-Robot Interaction (HRI) examines how people perceive their interactions with robots and how these interactions affect emotional and cognitive processes, beyond the technical and functional structure of HRI. Literature has often focused separately on psychological constructs such as attitude, emotion, trust, and perception; however, experimental research examining processes such as mind perception, affect, and long-term memory performance holistically has been limited. The study will test the hypotheses that robot type and scenario type will affect affect and long-term memory performance, and that mind perception will mediate this relationship. This study is based on a 3 × 2 factorial experimental design. There are a total of six experimental groups, including robot type (humanoid robot, mechanical robot, human) and scenario type (emotion-eliciting, neutral). Participants are randomly assigned to one of the groups and exposed to the relevant scenario. After the scenario presentation, measures of affect were taken using The Self-Assessment Manikin (SAM) and measures of mind perception were taken using the Mind Perception Scale; a surprise recall test was administered 48 hours later to measure long-term memory performance. Additionally, demographic variables and measures of attitudes toward robots and artificial intelligence are included in the analyses. The sample consists of undergraduate psychology students fat Bakırçay University. G*Power power analysis determined that a minimum of N = 120 participants would be sufficient to test the study's hypotheses.The data will be evaluated using appropriate statistical analyses and mediation models. This study is expected to provide experimental contributions regarding the multidimensional psychological processes involving perceptual, emotional, and memory processes in HRI and to focus on the cognitive and emotional outputs of social robots on humans.