Individual differences in decision speed have been regarded as direct reflections of a
“primitive” functional neurophysiological characteristic, which affects performance on all …

Frequently the relationship of the variability of reaction times (RTSD) on elementary
cognitive tasks and psychometric general intelligence (g) has been investigated. A typical …

Reaction time distributions from 303 subjects were partitioned into 16 fast-to-slow latency
bands. Average latencies for the 16 bands were then correlated separately with various …

Intraindividual variability (inconsistency) in reaction time (RT) latencies was investigated in a
group of younger (M= 25.46 years) and older (M= 69.29 years) men. Both groups performed …

In this study we discussed conceptual issues regarding the definition of variability and
investigated age-related differences in variability of performance. The following types of …

People often attribute poor performance to having bad days. Given that cognitive aging
leads to lower average levels of performance and more moment-to-moment variability, one …

Inconsistency in latency across trials of 2-choice reaction time data was analyzed in 273
participants ranging in age from 6 to 81 years. A U-shaped curve defined the relationship …

Performance variability across repeated task administrations may be an important indicator
of age-related cognitive functioning. In the present investigation, the authors examined …

Age differences in three basic types of variability were examined: variability between
persons (diversity), variability within persons across tasks (dispersion), and variability within …

Recent studies have documented that normal adults exhibit considerable variability in
cognitive performance from one occasion to another. We investigated this phenomenon in a …