“…First, the most informative items in the full AMBIANCE coding inventory were identified using latent trait modeling via item response theory (Haltigan et al., 2019). Second, the reliability and validity of this shortened measure, the AMBIANCE‐Brief (Madigan, Bronfman, Halitgan, & Lyons‐Ruth, 2018), was demonstrated in laboratory settings in relation to disorganized attachment (Cooke, Eirich, Racine, Lyons‐Ruth, & Madigan, 2020; Haltigan et al., 2019). The objective of the current study was to determine the feasibility of training family services agency providers, who are working directly with families at high social risk, in the reliable use of the AMBIANCE‐brief measure, within a relatively brief 2‐day training period that would not strain agency resources.…”