scholarly journals Characterising vascular cognitive impairment compared to cognitively healthy ageing with respect to reaction time, the intra‐individual variability of RT, and error production, practice effects and the task used in their measurement

2020 ◽  
Vol 16 (S6) ◽  
Author(s):  
Emma V. Richards ◽  
Antony Bayer ◽  
Andrea Tales
Keyword(s):  
Cognitive Impairment ◽  
Reaction Time ◽  
Vascular Cognitive Impairment ◽  
Individual Variability ◽  
Healthy Ageing ◽  
Practice Effects ◽  
Production Practice

scholarly journals Subcortical Ischemic Vascular Cognitive Impairment: Insights from Reaction Time Measures

2019 ◽  
Vol 72 (3) ◽  
pp. 845-857 ◽  
Author(s):  
Emma Richards ◽  
Antony Bayer ◽  
Jeremy J. Tree ◽  
Claire Hanley ◽  
Jade E. Norris ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Reaction Time ◽  
Vascular Cognitive Impairment

scholarly journals Reaction Time and Visible White Matter Lesions in Subcortical Ischemic Vascular Cognitive Impairment

2019 ◽  
Vol 72 (3) ◽  
pp. 859-865 ◽  
Author(s):  
Emma Richards ◽  
Antony Bayer ◽  
Claire Hanley ◽  
Jade E. Norris ◽  
Jeremy J. Tree ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Reaction Time ◽  
White Matter ◽  
White Matter Lesions ◽  
Vascular Cognitive Impairment

scholarly journals Reaction Time Decomposition as a Tool to Study Subcortical Ischemic Vascular Cognitive Impairment

2021 ◽  
pp. 1-11
Author(s):  
Emma Richards ◽  
Andrea Tales ◽  
Antony Bayer ◽  
Jade E. Norris ◽  
Claire Hanley ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Reaction Time ◽  
Healthy Aging ◽  
Real Life ◽  
Vascular Cognitive Impairment ◽  
Driving Safety ◽  
Group Differences ◽  
Healthy Older Adults ◽  
Time Decomposition

Background: The study of reaction time (RT) and its intraindividual variability (IIV) in aging, cognitive impairment, and dementia typically fails to investigate the processing stages that contribute to an overall response. Applying “mental chronometry” techniques makes it possible to separately assess the role of processing components during environmental interaction. Objective: To determine whether RT and IIV-decomposition techniques can shed light on the nature of underlying deficits in subcortical ischemic vascular cognitive impairment (VCI). Using a novel iPad task, we examined whether VCI deficits occur during both initiation and movement phases of a response, and whether they are equally reflected in both RT and IIV. Methods: Touch cancellation RT and its IIV were measured in a group of younger adults (n = 22), cognitively healthy older adults (n = 21), and patients with VCI (n = 21) using an iPad task. Results: Whereas cognitively healthy aging affected the speed (RT) of response initiation and movement but not its variability (IIV), VCI resulted in both slowed RT and increased IIV for both response phases. Furthermore, there were group differences with respect to response phase. Conclusion: These results indicate that IIV can be more sensitive than absolute RT in separating VCI from normal aging. Furthermore, compared to cognitively healthy aging, VCI was characterized by significant deficits in planning/initiating action as well as performing movements. Such deficits have important implications for real life actions such as driving safety, employment, and falls risk.

How Useful is the Power Law of Practice for Recognizing Practice in Concentration Tests?

2007 ◽  
Vol 23 (3) ◽  
pp. 157-165 ◽  
Author(s):  
Carmen Hagemeister
Keyword(s):  
Logistic Regression ◽  
Reaction Time ◽  
Power Law ◽  
Error Rate ◽  
Reaction Times ◽  
Practice Effect ◽  
Practice Effects ◽  
Rate Decrease ◽  
Small Practice

Abstract. When concentration tests are completed repeatedly, reaction time and error rate decrease considerably, but the underlying ability does not improve. In order to overcome this validity problem this study aimed to test if the practice effect between tests and within tests can be useful in determining whether persons have already completed this test. The power law of practice postulates that practice effects are greater in unpracticed than in practiced persons. Two experiments were carried out in which the participants completed the same tests at the beginning and at the end of two test sessions set about 3 days apart. In both experiments, the logistic regression could indeed classify persons according to previous practice through the practice effect between the tests at the beginning and at the end of the session, and, less well but still significantly, through the practice effect within the first test of the session. Further analyses showed that the practice effects correlated more highly with the initial performance than was to be expected for mathematical reasons; typically persons with long reaction times have larger practice effects. Thus, small practice effects alone do not allow one to conclude that a person has worked on the test before.

Prevalence of Vascular Cognitive Impairment Among a Veteran Population

2008 ◽  
Author(s):  
Ruth E. Yoash-Gantz ◽  
Kristin L. Humphrey ◽  
Jacqueline W. Friedman
Keyword(s):  
Cognitive Impairment ◽  
Vascular Cognitive Impairment

Behavioral variations among vascular cognitive impairment subtypes – A comparative study

2021 ◽  
pp. 1-8
Author(s):  
Ashwani Bhat ◽  
Atanu Biswas ◽  
Gautam Das ◽  
Durjoy Lahiri ◽  
Souvik Dubey ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Comparative Study ◽  
Vascular Cognitive Impairment
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