According to Crittendon's model,infants who have anxious-ambivalent attachments have experienced which pattern of learning or conditioning?

Question

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Infants with anxious-ambivalent attachments have experienced unpredictable reinforcement for expressions of need. This means that their attachment figures have sometimes responded appropriately to their needs, while other times they have been inconsistent or unresponsive. This unpredictable reinforcement can lead to anxiety and an inability to trust that their attachment figure will consistently meet their needs.

According to Crittendon's Model,infants Who Have Anxious-Ambivalent Attachments Have Experienced