Missing data are common in surveys regardless of research field, undermining statistical analyses and biasing results. One solution is to use an imputation method, which recovers missing data by estimating replacement values. Previously, we have evaluated the hot-deck k-Nearest Neighbour (kNN) method with Likert data in a software engineering context. In this paper, we extend the evaluation by ...

Cognitive load researchers have used varying subjective techniques based on rating scales to quantify experienced cognitive load. Although it is generally assumed that subjects can introspect their processes and no difficulty in assigning numerical values the imposed load, little known about how visual characteristics of influence validity measure. In this study we look at four (within groups) ...