Dr Karen Campbell

Karen Campbell

University position

Research Associate


Department of Psychology



Home page

https://sites.google.com/site/ka... (personal home page)

Research Theme

Cognitive and Behavioural Neuroscience


My research examines the cognitive and neural changes that accompany normal human ageing. In my doctoral work at the University of Toronto, jointly supervised by Profs. Lynn Hasher and Cheryl Grady, I examined age differences in attentional control and how these differences affect older adults' knowledge of the world around them. Using fMRI, we found that older adults under-recruit the frontoparietal attentional control network and this leads them to encode more distraction than younger adults. Ongoing research suggests that age differences in this frontoparietal network fluctuate with time of testing, with minimal differences seen in the morning (an optimal time of day for most older adults).

Now as a postdoctoral research associate with the Cambridge Centre for Ageing and Neuroscience (www.cam-can.com), I am continuing to examine age differences in the recruitment of widespread neural networks and relating these to concomitant differences in cognition and underlying brain structure.

Increased network variability in older adults relative to younger adults while freely viewing a short film
Increased network variability in older adults relative to younger adults while freely viewing a short film
View image full-size (1152x594 pixels)

Research Focus





functional connectivity


Clinical conditions

No direct clinical relevance


Behavioural analysis

Cross-sectional and cohort studies

Magnetic resonance imaging (MRI)



Richard Henson

Meredith Shafto

Lorraine Tyler


Cheryl Grady Web: http://research.baycrest.org/cgrady

Lynn Hasher Web: http://www.psych.utoronto.ca/users/h...

Associated News Items



Anderson JA, Campbell KL, Amer T, Grady CL, Hasher L (2014), “Timing Is Everything: Age Differences in the Cognitive Control Network Are Modulated by Time of Day.” Psychol Aging Details

Campbell KL, Trelle A, Hasher L (2014), “Hyper-binding across time: Age differences in the effect of temporal proximity on paired-associate learning.” J Exp Psychol Learn Mem Cogn 40(1):293-9 Details


Biss RK, Campbell KL, Hasher L (2013), “Interference from previous distraction disrupts older adults' memory.” J Gerontol B Psychol Sci Soc Sci 68(4):558-61 Details

Biss RK, Ngo KW, Hasher L, Campbell KL, Rowe G (2013), “Distraction can reduce age-related forgetting.” Psychol Sci 24(4):448-55 Details

Campbell KL, Grigg O, Saverino C, Churchill N, Grady CL (2013), “Age differences in the intrinsic functional connectivity of default network subsystems.” Front Aging Neurosci 5:73 Details

Farb NA, Grady CL, Strother S, Tang-Wai DF, Masellis M, Black S, Freedman M, Pollock BG, Campbell KL, Hasher L, Chow TW (2013), “Abnormal network connectivity in frontotemporal dementia: evidence for prefrontal isolation.” Cortex 49(7):1856-73 Details

Healey MK, Hasher L, Campbell KL (2013), “The role of suppression in resolving interference: evidence for an age-related deficit.” Psychol Aging 28(3):721-8 Details


Campbell KL, Grady CL, Ng C, Hasher L (2012), “Age differences in the frontoparietal cognitive control network: implications for distractibility.” Neuropsychologia 50(9):2212-23 Details

Campbell KL, Zimerman S, Healey MK, Lee MM, Hasher L (2012), “Age differences in visual statistical learning.” Psychol Aging 27(3):650-6 Details


Campbell KL, Al-Aidroos N, Fatt R, Pratt J, Hasher L (2010), “The effects of multisensory targets on saccadic trajectory deviations: eliminating age differences.” Exp Brain Res 201(3):385-92 Details

Campbell KL, Hasher L, Thomas RC (2010), “Hyper-binding: a unique age effect.” Psychol Sci 21(3):399-405 Details

Healey MK, Campbell KL, Hasher L, Ossher L (2010), “Direct evidence for the role of inhibition in resolving interference in memory.” Psychol Sci 21(10):1464-70 Details


Campbell KL, Al-Aidroos N, Pratt J, Hasher L (2009), “Repelling the young and attracting the old: examining age-related differences in saccade trajectory deviations.” Psychol Aging 24(1):163-8 Details

Campbell KL, Ryan JD (2009), “The effects of practice and external support on older adults' control of reflexive eye movements.” Neuropsychol Dev Cogn B Aging Neuropsychol Cogn 16(6):745-63 Details


Healey MK, Campbell KL, Hasher L (2008), “Cognitive aging and increased distractibility: costs and potential benefits.” Prog Brain Res 169:353-63 Details