Objectives: The present study aimed to investigate the possible effects of laterality and handedness on higher-order sensory functions and manual dexterity of the elderly. Methods: In this non-experimental cross-sectional study, 58 elderly people aged 60-75 years (35 right-handed) were recruited through a convenience sampling method. Laterality of the selected subjects was examined using the E...

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The Choice Between Fixed and Random Effects Models: Some Considerations for Educational Research We discuss fixed and random effects models in the context of educational research and set out the assumptions behind the two approaches. To illustrate the issues, we analyse the determinants of pupil achievement in primary school, using data from the Avon Longitudinal Study of Parents and Children. ...

Twenty-five years ago, Dennis Egan published a review on the impact of individual differences in human-computer interaction, where he claimed that users are more diverse than designs are [5]. While being cited frequently, this claim has not been tested since then. An efficient research design for separating and comparing variance components is presented, together with a statistical model to tes...