Hermann Rorschach's inkblot test has become an important tool for diagnosis over time and has been used in psychology theses at universities. A major study by the American Psychological Association found that the Rorschach Test is more effective than thought at diagnosing mental illnesses. This study aimed to review the Rorschach Test assessments and psychiatric diagnoses by examining the archive records of patients who received inpatient treatment in a mental health hospital and underwent the Rorschach Test, to determine the distribution of diagnoses between 1978 and 1992, and to examine the compatibility of Rorschach Test assessments and psychiatric diagnoses. The researchers were also curious about the transformation in mental health terminology, and they evaluated these findings. The records of 1348 patients were reviewed. Folders were examined by considering the patient's age, gender, city of residence, Rorschach test assessments and psychiatric diagnosis. All data were coded and analyzed with the SPSS program. Findings showed that 70 % of the 1348 patients were male, 30 % were female; 40% of them were in the neurotic disorder, 60 % of them were in the psychotic disorder diagnostic groups. Correlation analyses showed that while there was a 78 % similarity in the psychosis subgroup, there was only a 50 % similarity in the neurotic disorders between Rorschach test assessments and psychiatric diagnoses. It was also noticed that the concepts used in the terminology are not used today or have transformed into different concepts. This study attempted to shed light on a section of the mental health understanding of the period.