We were conducting a field study with children wherein we had to show them a few placards and collect the necessary information. 

On the first day, we had the placards in our respective devices. As a result of limitations of size, the images were too small which led to utter confusion among children and unclear responses. 

From the following day onwards, we kept the placards in the form of flip charts in spiral-bound sheets for the children to be able to easily recognize the image and give prompt and clear responses. This technique also helped us in getting children to participate more enthusiastically in the survey since they found the pictures very attractive and thoroughly enjoyed looking at them. 

Lesson learned: Ensure that the means used for data collection are in a proper and understandable manner before starting any survey.