Editing Race and intelligence (section)

===Mental chronometry===
{{Main|Mental chronometry}}
[[Mental chronometry]] measures the elapsed time between the presentation of a sensory stimulus and the subsequent behavioral response by the participant. These studies have shown inconsistent results when comparing black and white populations groups, with some studies showing whites outperforming blacks, and others showing blacks outperforming whites.{{sfn|Sheppard|Vernon|2008}} 

Arthur Jensen argued that this reaction time (RT) is a measure of the speed and efficiency with which the brain processes information,<ref name="Jensen 2006">{{harvnb|Jensen|2006}}</ref> and that scores on most types of RT tasks tend to correlate with scores on standard IQ tests as well as with ''g''.<ref name="Jensen 2006" /> Nisbett argues that some studies have found correlations closer to 0.2, and that a correlation is not always found.<ref name="Nisbett 2009">{{harvnb|Nisbett|2009}}</ref> Nisbett points to the {{harvp|Jensen|Whang|1993}} study in which a group of Chinese Americans had longer reaction times than a group of European Americans, despite having higher IQs. Nisbett also mentions findings in {{harvp|Flynn|1991}} and {{harvp|Deary|2001}} suggesting that movement time (the measure of how long it takes a person to move a finger after making the decision to do so) correlates with IQ just as strongly as reaction time, and that average movement time is faster for black people than for white people.{{sfn|Nisbett|2009|pp=221–2}} {{harvtxt|Mackintosh|2011|page=339}} considers reaction time evidence unconvincing and comments that other cognitive tests that also correlate well with IQ show no disparity at all, for example the habituation/[[dishabituation]] test. He further comments that studies show that rhesus monkeys have shorter reaction times than American college students, suggesting that different reaction times may not tell us anything useful about intelligence.