The interview is an instrument of interpersonal communication that consists of a dialogue aimed at obtaining specific information from an interviewee through a series of planned or spontaneous questions.

In psychology, the interview is considered both a technique and a human relationship that allows the establishment of meaningful connections between the interviewer and the interviewee. This bond facilitates a deep understanding of the interviewee's needs, emotions, and cognitive processes, which is essential for diagnosis, assessment, and follow-up in clinical, educational, or social contexts.

The origin of the interview dates back to ancient times. Philosophers such as Socrates used dialogical methods, like the Socratic method, to guide knowledge through dialogue. In the medical field, Hippocrates used interviews to develop clinical diagnoses based on conversations with the patient.

The development in psychology was crucial with Sigmund Freud, who in 1893 introduced the interview within the psychoanalytic method to access the origin of psychological symptoms through therapeutic dialogue. Freud established the interview as a key tool for diagnosing and treating mental conditions that had no apparent physical origin.

The interview is of vital importance because it allows for the collection of qualitative and contextual data that cannot be obtained with other standardized instruments. It provides the opportunity to clarify responses, explore sensitive topics in greater depth, and build a deep understanding based on the interviewee's experience and perceptions.

The interview extends to multiple areas, such as personnel selection, social research, and education, where its usefulness lies in its flexibility, informational depth, and ability to adapt to the specific context and objectives.

Its importance also lies in the fact that, when well-conducted, the interview can reveal subjective and emotional aspects that other methods fail to detect, thus allowing a comprehensive approach to the individual or phenomenon being studied.

The interview is used in a wide variety of contexts and for different purposes. In the clinical field, it serves for psychological assessment and therapeutic follow-up. In personnel selection, it facilitates the evaluation of skills and attitudes. In qualitative research, it is essential for collecting rich content data, allowing for the analysis of narratives and meanings.

Depending on its level of structuring (structured, semi-structured, or unstructured), the interview can be adapted to explore topics with greater or lesser control over the questions, allowing for different levels of depth or comparison between interviewees. It can also be applied to different age groups and in various disciplines.

The interview not only involves data collection but also an interactive process where the observation of nonverbal language and the trust generated play a crucial role in its effectiveness. It is a tool that adapts according to the level of structuring used: structured, semi-structured, or open.