“…The RCADS is a validated and widely used measure with high internal consistency, which corresponds to DSM‐IV disorder classifications (Chorpita et al., ; Chorpita, Moffitt, & Gray, ; Ebesutani et al., ). - The 21‐item obsessive‐compulsive inventory—child version (OCI‐CV; Foa et al., ). This scale was chosen because it is shorter than alternative established measures such as the Children's Yale‐Brown Obsessive Compulsive Scale (CY‐BOCS; Scahill et al., ), but is significantly correlated with these, and is demonstrated to be a reliable and valid measure of obsessive‐compulsive symptomatology (Foa et al., ; Iniesta‐Sepúlveda, Rosa‐Alcázar, Rosa‐Alcázar, & Storch, ; Jones et al., ).
- The “Strengths and Difficulties Questionnaire” Parent and Child versions. These provide a brief yet reliable measure of behavior and psychopathology in children aged 4–16 (11–16 for the self‐report measure; Goodman, 1997, ; Goodman & Scott, ).
- A measure of the therapeutic alliance: the session rating scale Adult, completed by Susan's mother (Duncan, Miller, Sparks, Claud, et al., ), and Child, completed by Susan (Duncan, Miller, Sparks, & Johnson, ), versions.
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