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Sequence during 1 Block:

Type A participants choose between urns

  • After the urns have been shuffled, one of them is better for you because it has more {% if participant.group_assignment == C.GROUP_TRIANGLE %} {{subsession.session.winning_color_triangle}} {% elif participant.group_assignment == C.GROUP_SQUARE %} {{subsession.session.winning_color_square}} {% endif %} marbles.
  • Because the urns are shuffled at the beginning of a block and the colours of the marbles are hidden, you don't know for sure which urn is better.
  • But because you can always see the colour of the marble that is drawn from the urn you choose, and because the urns are not shuffled during the 4 rounds in a block, you can try to find out in those 4 rounds which urn has more marbles of your winning colour.
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