promotion image of download ymail app
Tia B asked in Social SciencePsychology · 1 decade ago

What types of research is used to establish developmental milestones and trends?

1 Answer

  • ny21tb
    Lv 7
    1 decade ago
    Favorite Answer

    social and, economic changes as, projected over a period of decades.

    • Commenter avatarLogin to reply the answers
Still have questions? Get your answers by asking now.