when to use lavaan causes of heywood case is heywood case negative causes of heywood case which outliers are responsible for heywood cases? which factor causes heywood case? what is the outlier in the heywood case heywood case definition r why are outliers in cfa heywood case definition what is the cause of heywood case why is heywood case negative is heywood a case of mlm is heywood case considered non normal is heywood a valid outlier heywood case which model uses a definite matrix in lavaan? which factor causing heywood case what causes heywood case r can you find the outliers in lavaan?