noun (n)

• willingness or readiness to receive (especially impressions or ideas)(noun.attribute)

  Example:
  He was testing the government's receptiveness to reform.
  This receptiveness is the key feature in oestral behavior, enabling natural mating to occur.
  

  Synonym:
  openness, receptivity
  

  source: wordnet30
• The quality of being receptive.(noun)

  source: webster1913