adjectives - request for references

[Jan de Jong]

Dear colleagues,

I've read occasional references to the role of markedness in the
acquisition of adjectives. The fact that the question is asked 'how big
is it', rather than 'how small is it' would parallel the finding that
children to learn unmarked 'big' before marked 'small'. Could anyone
guide me to relevant references with regard to the acquisition of such
(gradual) adjectives?

Jan de Jong