anhedonia
Lau, Chloe, Stewart, Shannon L., Saklofske, Donald H., Hirdes, John 2019. Scale development and psychometric properties of internalizing symptoms: The interRAI Child and Youth Mental Health internalizing subscale. Psychiatry Research. 278 () 235-241.
Rios, Sebastian, Perlman, Christopher M 2018. Social Withdrawal Among Individuals Receiving Psychiatric Care: Derivation of a Scale Using Routine Clinical Assessment Data to Support Screening and Outcome Measurement. Journal of Behavioral Health Services & Research. 45 (4) 579-592.