Preference for information was measured using a 10-point rating scale, ranging from score 1 (wanting as little information as possible) to score 10 (wanting all the information there is) (Blanchard et al, 1988).
Information about the broader elements of health literacy [ 43] including the ability to seek, understand and utilize health information, was measured using the Health Literacy Measurement Scale (HeLMS) [ 44, 45].
Sources of information were measured using a scale by Seock and Bailey (2009).
The minimum distances to the nearest bodies of water including lakes, reservoirs and rivers, as the polygon-type information, were measured using a proximity function of spatial analysis in such an algorithm that the minimal distance from each case and control site to its nearest water body edge was calculated.
The relevance of health information is measured using two indicators.
Control variables will include demographic information as measured using a two-page self-constructed survey.
HIV/AIDS related information was measured using 18 items with "yes", "no" or "do not know" response.
The IS construct included system quality and information quality, measured using eight items adapted from Otieno, Toyama, Asonuma, Kanai-Pak, and Naitoh [ 62] and Wixom and Todd [ 60].
Selective attention and the ability to inhibit the effect of distracting information were measured using the flanker task, in which participants are asked to indicate which direction the central arrow is pointing.
Trust in types of sources of information was measured using a 5-point ordinal scale: do not trust at all, distrust somewhat, neither trust nor distrust, trust somewhat, trust completely, don't know[ 15].
