The impact of single and multi cards on CHS users in making health decisions. Search interface: (SC) single correct card, (SN) single incorrect card, (MC) multi cards with a correct card, (MN) multi cards with incorrect card. The superscripts indicate statistical significance (unpaired t-test) between the result and the result from the condition associated with the superscript (lower cases refer to α < 0.05 and upper cases refer to α < 0.01 ). Higher results are better for measurements 1, 2, 5 and 6. Vice versa for measurements 3 and 4.