A three-item scale measuring a consumer's subjective perception of the difficulty and cognitive load involved in a numerical calculation task. Items tap the overall complexity of the task, the difficulty of tracking multiple elements simultaneously, and the computational challenge involved. Developed as a manipulation check for calculation difficulty in grocery budgeting research, the scale is applicable more broadly to any experimental context in which the perceived cognitive complexity of a numerical or arithmetic task is relevant.
Van Ittersum, Koert, Joost M. E. Pennings, and Brian Wansink (2010). Trying harder and doing worse: How grocery shoppers track in-store spending. Journal of Marketing, 74(2), 90–104.
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