Structural extensions of a hierarchical view on human cognitive abilities

During the 1990s, research within the Individual Differences Unit at the Un iversity of Sydney was oriented towards expanding knowledge of poorly under stood domains of human cognition. The theory of fluid and crystallized inte lligence (Gf/Gc) served as the overarching framework. This research has led to an improved understanding of the nature of complexity and the role of w orking memory in Gf. Another outcome has been the charting of factors under lying of mental speed, tactile/kinesthetic performance, and olfactory memor y. Recently, there has been exploration of the "borderline area" between ab ilities and personality. Our work on self-confidence and self-monitoring of cognitive performance has demonstrated excellent measurement properties of scores based on confidence ratings. We have also established a clear separ ation of a broad self-confidence factor from traditional intelligence and p ersonality factors. Our research in these borderline areas has also explore d the status of emotional intelligence. Results from several studies raise questions regarding the measurement of this construct. (C) 2001 Elsevier Sc ience Inc. All rights reserved.