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Related Concept Videos

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Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
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During early development, the embryo forms two types of connective tissues— the mesenchyme and mucoid connective tissue.
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Related Experiment Video

Updated: Feb 8, 2026

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
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Getting connected: Intergroup contact on Facebook.

Anne Katrin Schwab1, Christina Sagioglou2, Tobias Greitemeyer3

  • 1a University of Innsbruck.

The Journal of Social Psychology
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Summary

Virtual contact on Facebook can improve intergroup relations between hostile nations. This study shows that online interactions independently reduce prejudice, even without prior real-life contact.

Keywords:
Facebookintergroup contactonline social networksprejudicevirtual contact

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Area of Science:

  • Social Psychology
  • Intergroup Relations
  • Online Communication

Background:

  • The contact hypothesis suggests intergroup contact reduces prejudice.
  • Previous research primarily focused on real-life interactions.
  • The role of virtual contact, especially between hostile nations, remains less explored.

Purpose of the Study:

  • To investigate the relationship between virtual contact (via Facebook) and intergroup relations.
  • To examine if virtual contact is associated with reduced affective prejudice.
  • To determine if virtual contact has an independent effect on outgroup attitudes.

Main Methods:

  • A correlational study involving followers of online campaigns from Iran and Israel.
  • Participants reported on virtual and real-life outgroup contact quantity and quality.
  • Affective prejudice towards the outgroup was measured.

Main Results:

  • Overall contact was negatively associated with affective prejudice.
  • Virtual contact demonstrated an independent link to positive outgroup attitudes.
  • Previously experienced real-life contact did not moderate the observed effects.

Conclusions:

  • Virtual contact, specifically via social media platforms like Facebook, can foster positive intergroup relations.
  • The findings support the applicability of the contact hypothesis in exclusively virtual settings.
  • Virtual interactions may have a significant and independent impact on reducing prejudice between citizens of hostile nations.