Information Processing Speed
Cognitive processing speed; Processing speed
Information processing speed (IPS) is a measure of the efficiency of cognitive function. It is assessed using timed tests that typically challenge relatively simple cognitive operations. IPS is expressed in terms of reaction time, the time required to complete a series of operations, or the number of items answered correctly in a set period of time. Clinical instruments designed to assess IPS range widely from simple reaction times to more complex measures, such as the Processing Speed Index of the Wechsler Intelligence Scales.
IPS is one of the oldest constructs studied in psychology. The first example of systematic research on IPS was conducted by Fransisco Donders during the 1860s. Donders developed a straightforward, but revolutionary, method of calculating differences in reaction times to measure the “speed of mental processes.” He demonstrated that more complex cognitive demands resulted in...
References and Readings
- Deluca, J., & Kalmar, J. H. (2008). Information processing speed in clinical populations. New York: Psychology Press.Google Scholar
- Donders, F. C. (1868). Die Schnelligkeit der psychischer Prozesse. Archiv für Anatomie und Physiologie, 657–681.Google Scholar
- Salthouse, T. A. (1985). A theory of cognitive aging. Amsterdam: North-Holland.Google Scholar