My interests span modern psychometric methods (e.g., item response theory), cognitive and intelligence, and quantitative methods. My main research program has been to integrate cognitive theory into psychometric models and test design. To this goal, I have been developing new item response theory models and conducting empirical research on the cognitive basis of an individual's responses. Recently, this effort has lead to the exciting possibility of "tests without items".
Most of my current research would fall under the labels applied cognition or cognitive ergonomics: how cognition (e.g., knowledge, expertise, working memory, attention allocation, strategy selection) interacts with environmental components (e.g., technology, the representation of flight data, available automation, patient symptoms, presence of teammates) to affect the operator's performance, learning, transfer, workload, situation awareness, and strategic thinking.
My research spans several related research areas of differential, educational, cognitive, applied experimental, and industrial and organizational psychology. Theory and empirical research I have conducted relates to the nature of adult learning, skill acquisition, student and employee selection, training, abilities, personality, and motivation.
I study individual differences in adult cognitive development. I am interested in age-related declines in basic mechanisms of cognition, memory, and information processing, especially in terms of understanding ‘successful cognitive aging.’ That is, characterizing who declines and who does not, and evaluating possible explanations for the differences. A major focus of my research program is in metacognition and strategic self-regulation –evaluating how people monitor and adapt their behavior in tasks to improve their performance.