The document discusses different types of interviews used in psychology: structured, semi-structured, and unstructured. A structured interview involves asking all candidates the same predetermined questions in the same order to allow for objective comparison. A semi-structured interview involves both predetermined and spontaneous questions to provide a more personalized approach. An unstructured interview has no predetermined questions and follows a free-flowing conversation format to explore topics in depth. The document outlines the key characteristics, steps, advantages, and disadvantages of each interview type.