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Attachment and Biobehavioral Catch-Up (ABC) Intervention

Meets HHS criteria for an evidenced based model

Last Updated: April 2017

Effects Shown in Research & Outcome Measure Details for Child Development and School Readiness Outcomes

Impact Studies Rated Moderate


Bernard, K., Dozier, M., Bick, J., Lewis-Morrarty, E., Lindhiem, O., & & Carlson, E. (2012). Enhancing attachment organization among maltreated children: Results of a randomized clinical trial. Child Development, 83(2), 623–636.
Show Study Effects Details
About this Table
Outcome Effect Sample Timing of Follow-Up Sample Size Program Group Comparison Group Mean Difference or Odds Ratio
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Statistical Significance
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Effect Size
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Outcome Type
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Strange Situation Procedure - Disorganized Attachment1 Favorable Full analytic sample Approximately 1 month after program end, or longer if child not yet old enough to measure outcome. 120 children Unadjusted proportion = 0.32 Unadjusted proportion = 0.57 MD = -0.251 Statistically significant, p = 0.012 HomVEE = 0.672 Primary
Strange Situation Procedure - Secure Attachment2 No Effect Full analytic sample Approximately 1 month after program end, or longer if child not yet old enough to measure outcome. 120 children Unadjusted proportion = 0.52 Unadjusted proportion = 0.33 MD = 0.19 Not statistically significant, p = 0.082 HomVEE = 0.462 Primary

1 Negative value is favorable to the intervention.

2 Effect size and significance based on adjusted odds ratio provided to HomVEE by the authors.

Show Study Outcome Measure Summary
About This Table
Outcome Description of Measure Data Collection Method Properties of the Outcome Measure Outcome Type
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Disorganized attachment Strange Situation, a laboratory assessment of children's reliance on the parent when they are distressed. Parent-child assessment Videotapes were double coded, and coders agreed on 87% of organized-disorganized classifications. Primary
Secure attachment Strange Situation, a laboratory assessment of children's reliance on the parent when they are distressed. Parent-child assessment Videotapes were double coded, and coders agreed on 92% of secure-insecure classifications. Primary
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