The Strange Situation is also known as Ainsworth's Stranger Paradigm.

• A. The Strange Situation
• B. The Stranger Paradigm
• C. Ainsworth's Stranger Paradigm
• D. The Infant Separation Procedure

Answer: (D)

The main idea here is recognizing that the Strange Situation is a structured observational procedure Mary Ainsworth developed to study infant attachment by watching how infants react to separations and reunions with their caregiver and a stranger. The best match among the options is the one that ties the method to Ainsworth and signals a formal procedure, which is Ainsworth's Stranger Paradigm. The other labels are less accurate: simply calling it The Strange Situation doesn’t reflect the attribution to Ainsworth, The Stranger Paradigm lacks that authorial link, and The Infant Separation Procedure would mischaracterize the focus as only on separations rather than the full sequence and coding of behaviors that define the procedure.