The dataset contains scores from the Lausanne Trilogue Play videotaped triadic observation (total family scores and family organization scores) and FACES-IV self-reported test scores (all subscales and ratios) from a sample of parents and families whose member was affected by a restrictive eating disorder (RED). Data regarding FACES-IV self-report questionnaire provide a qualitative and quantitative evaluation of mothers and fathers’ perceived family functioning in different fields (e.g., communication, satisfaction, etc.). Data regarding the clinical version of the Lausanne Trilogue Play (LTPc) provide a standardized evaluation of family functioning, giving the type of family alliance. Dataset The dataset can help to understand if a typical profile is present and compare subjective family perception with standardized evaluation by the clinician. Data were collected at baseline. Dataset does not contain any longitudinal data.