trivandrum developmental screening chart trivandrum developmental screening chart trivandrum developmental screening test (tdsc) is a developmental screening test for children. it was developed by selecting 17 test items from bsid (baroda norms). trivandrum developmental screening chartpurposedevelopmental screening test for children history it was developed and designed at the child development centre, sat hospital, government medical college, trivandrum, kerala in 1991. test it was validated both at the hospital and the community level against the standard denver developmental screening test. with a sensitivity of 66.7% and specificity of 78.8%, it can be used even by community level health worker for mass screening and takes around 5 minutes to complete.includes adequate mental and motor development milestones spread over the first 2 years. requires only a pencil and a bunch of keys as test items.