Some psychologists believe that 'while object permanence alone may not predict communicative achievement, object permanence along with several other sensorimotor milestones, plays a critical role in, and interacts with, the communicative development of children with severe disabilities'. This was observed in 2006, in a study recognizing where the full mastery of object permanence is one of the milestones that ties into a child's ability to engage in mental representation.

Source: http://en.wikipedia.org/wiki/Object_permanence#Recent_studies

Thank you very much.

1 Answer 1


Predict means to say now what will happen later.

Milestones is jargon for "age-appropriate achievements|mastery of function".

Ties into is just a sloppy|casual phrase for "is associated with".

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