This paper is meant to highlight the occurrence of Simpson's Paradox when using aggregated data obtained from two IEA studies in Israel, while ignoring the effect of a powerful intervening variable in the local context--the ethnicity factor. It will demonstrate faulty conclusions regarding either the absence of relationships between a contextual…

Prior studies have often confounded linguistic and perceptual performance when evaluating deaf subjects' skills, a confusion that may be responsible for results indicating lesser recall ability among the deaf. In this series of studies this linguistic/perceptual confound was investigated in both the iconic and short term memory of deaf…

This paper examines possible explanations for the fact that evaluation results are rarely used. Most explanatory factors for use of results in decision making mentioned in the literature have been clustered in three categories of variables. They concern: (1) the making of decisions about the practical problem; (2) the way in which evaluation is…