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Lynn Hasher

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https://www.readbyqxmd.com/read/28477041/on-the-preservation-of-vigilant-attention-to-semantic-information-in-healthy-aging
#1
David R Thomson, Lynn Hasher
Despite decades of research on younger adults, little is known about the way in which vigilant attention is affected by healthy aging, and the small body of work that does exist has yielded mixed findings. Prior examinations of aging and vigilant attention have focused almost exclusively on sensory/perceptual tasks despite the fact that many real-world vigilance tasks are semantic in nature and it has been shown that older adults exhibit memory and attention deficits in semantic tasks in other domains. Here, we present the first empirical investigation of vigilant attention to verbal stimuli in healthy normal aging...
May 5, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28361617/optimal-testing-time-for-suppression-of-competitors-during-interference-resolution
#2
K W Joan Ngo, Lynn Hasher
Interference between competing memory traces is a common cause of memory failure. Recent research has demonstrated a suppression mechanism that operates at retrieval to resolve interference. Using an adaptation of the suppression paradigm in Healey, Ngo, and Hasher [(2014). Below-baseline suppression of competitors during interference resolution by younger but not older adults. Psychological Science, 25(1), 145-151. doi: 10.1177/0956797613501169 ], we tested whether the ability to suppress competing memory traces varies with the synchrony between optimal arousal period and time of testing...
March 31, 2017: Memory
https://www.readbyqxmd.com/read/28129055/task-linked-diurnal-brain-network-reorganization-in-older-adults-a-graph-theoretical-approach
#3
John A E Anderson, Saman Sarraf, Tarek Amer, Buddhika Bellana, Vincent Man, Karen L Campbell, Lynn Hasher, Cheryl L Grady
Testing older adults in the morning generally improves behavioral performance relative to afternoon testing. Morning testing is also associated with brain activity similar to that of young adults. Here, we used graph theory to explore how time of day (TOD) affects the organization of brain networks in older adults across rest and task states. We used nodes from the automated anatomical labeling atlas to construct participant-specific correlation matrices of fMRI data obtained during 1-back tasks with interference and rest...
October 19, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27900585/divided-attention-reduces-resistance-to-distraction-at-encoding-but-not-retrieval
#4
Jennifer C Weeks, Lynn Hasher
Older adults show implicit memory for previously seen distraction, an effect attributed to poor attentional control. It is unclear whether this effect results from lack of control over encoding during the distraction task, lack of retrieval constraint during the test task, or both. In the present study, we simulated poor distraction control in young adults using divided attention at encoding, at retrieval, at both times, or not at all. The encoding task was a 1-back task on pictures with distracting superimposed letter strings, some of which were words...
November 29, 2016: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/27863886/cognitive-control-as-a-double-edged-sword
#5
REVIEW
Tarek Amer, Karen L Campbell, Lynn Hasher
Cognitive control, the ability to limit attention to goal-relevant information, aids performance on a wide range of laboratory tasks. However, there are many day-to-day functions which require little to no control and others which even benefit from reduced control. We review behavioral and neuroimaging evidence demonstrating that reduced control can enhance the performance of both older and, under some circumstances, younger adults. Using healthy aging as a model, we demonstrate that decreased cognitive control benefits performance on tasks ranging from acquiring and using environmental information to generating creative solutions to problems...
December 2016: Trends in Cognitive Sciences
https://www.readbyqxmd.com/read/27338513/age-differences-in-the-neural-correlates-of-distraction-regulation-a-network-interaction-approach
#6
Tarek Amer, John A E Anderson, Karen L Campbell, Lynn Hasher, Cheryl L Grady
Older adults show decrements in the ability to ignore or suppress distraction relative to younger adults. However, age differences in the neural correlates of distraction control and the role of large-scale network interaction in regulating distractors are scarcely examined. In the current study, we investigated age differences in how the anticorrelation between an externally oriented dorsal attention network (DAN) and an internally focused default mode network (DMN) is related to inhibiting distractors presented during a 1-back working memory task...
June 20, 2016: NeuroImage
https://www.readbyqxmd.com/read/27153195/age-related-deficits-in-inhibition-in-figure-ground-assignment
#7
John A E Anderson, M Karl Healey, Lynn Hasher, Mary A Peterson
We assessed age differences in the ability to resolve competition for figural status in stationary displays using small, enclosed, symmetrical silhouettes that participants classified as depicting "novel" or "familiar" shapes. The silhouettes were biased such that the inside was perceived as the shaped figure, and the outside was perceived as a shapeless ground. The critical manipulation was whether a portion of a meaningful object was suggested on the outside of the border of some of the novel silhouettes but not others (M+Ground and M-Ground novel silhouettes, respectively)...
May 1, 2016: Journal of Vision
https://www.readbyqxmd.com/read/26946068/cultural-differences-in-visual-attention-implications-for-distraction-processing
#8
Tarek Amer, K W Joan Ngo, Lynn Hasher
We investigated differences between participants of East Asian and Western descent in attention to and implicit memory for irrelevant words which participants were instructed to ignore while completing a target task (a Stroop Task in Experiment 1 and a 1-back task on pictures in Experiment 2). Implicit memory was measured using two conceptual priming tasks (category generation in Experiment 1 and general knowledge in Experiment 2). Participants of East Asian descent showed reliable implicit memory for previous distractors relative to those of Western descent with no evidence of differences on target task performance...
May 2017: British Journal of Psychology
https://www.readbyqxmd.com/read/26833317/face-name-learning-in-older-adults-a-benefit-of-hyper-binding
#9
Jennifer C Weeks, Renée K Biss, Kelly J Murphy, Lynn Hasher
Difficulty remembering faces and corresponding names is a hallmark of cognitive aging, as is increased susceptibility to distraction. Given evidence that older adults spontaneously encode relationships between target pictures and simultaneously occurring distractors (a hyper-binding phenomenon), we asked whether memory for face-name pairs could be improved through prior exposure to faces presented with distractor names. In three experiments, young and older adults performed a selective attention task on faces while ignoring superimposed names...
February 1, 2016: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/25540620/development-and-evaluation-of-a-self-administered-on-line-test-of-memory-and-attention-for-middle-aged-and-older-adults
#10
Angela K Troyer, Gillian Rowe, Kelly J Murphy, Brian Levine, Larry Leach, Lynn Hasher
There is a need for rapid and reliable Internet-based screening tools for cognitive assessment in middle-aged and older adults. We report the psychometric properties of an on-line tool designed to screen for cognitive deficits that require further investigation. The tool is composed of measures of memory and executive attention processes known to be sensitive to brain changes associated with aging and with cognitive disorders that become more prevalent with age. Measures included a Spatial Working Memory task, Stroop Interference task, Face-Name Association task, and Number-Letter Alternation task...
2014: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/25376192/conceptual-processing-of-distractors-by-older-but-not-younger-adults
#11
Tarek Amer, Lynn Hasher
Evidence from perceptually based implicit memory tasks demonstrates greater priming from distracting information among older compared with younger adults. We examined whether older adults also show greater conceptually based implicit priming from distracting information. We measured priming using a general-knowledge test that was preceded by an incidental-encoding task (a color-naming Stroop task in one experiment and a 1-back task involving pictures with irrelevant words superimposed in a second experiment)...
December 2014: Psychological Science
https://www.readbyqxmd.com/read/24999661/timing-is-everything-age-differences-in-the-cognitive-control-network-are-modulated-by-time-of-day
#12
John A E Anderson, Karen L Campbell, Tarek Amer, Cheryl L Grady, Lynn Hasher
Behavioral evidence suggests that the attention-based ability to regulate distraction varies across the day in synchrony with a circadian arousal rhythm that changes across the life span. Using functional magnetic resonance imaging (fMRI), we assessed whether neural activity in an attention control network also varies across the day and with behavioral markers. We tested older adults in the morning or afternoon and younger adults tested in the afternoon using a 1-back task with superimposed distractors, followed by an implicit test for the distractors...
September 2014: Psychology and Aging
https://www.readbyqxmd.com/read/24634662/the-disruptive-and-beneficial-effects-of-distraction-on-older-adults-cognitive-performance
#13
Jennifer C Weeks, Lynn Hasher
Older adults' decreased ability to inhibit irrelevant information makes them especially susceptible to the negative effects of simultaneously occurring distraction. For example, older adults are more likely than young adults to process distraction presented during a task, which can result in delayed response times, decreased reading comprehension, disrupted problem solving, and reduced memory for target information. However, there is also some evidence that the tendency to process distraction can actually facilitate older adults' performance when the distraction is congruent with the target information...
2014: Frontiers in Psychology
https://www.readbyqxmd.com/read/24214245/below-baseline-suppression-of-competitors-during-interference-resolution-by-younger-but-not-older-adults
#14
M Karl Healey, K W Joan Ngo, Lynn Hasher
Resolving interference from competing memories is a critical factor in efficient memory retrieval, and several accounts of cognitive aging suggest that difficulty resolving interference may underlie memory deficits such as those seen in the elderly. Although many researchers have suggested that the ability to suppress competitors is a key factor in resolving interference, the evidence supporting this claim has been the subject of debate. Here, we present a new paradigm and results demonstrating that for younger adults, a single retrieval attempt is sufficient to suppress competitors to below-baseline levels of accessibility even though the competitors are never explicitly presented...
January 2014: Psychological Science
https://www.readbyqxmd.com/read/23957222/the-role-of-suppression-in-resolving-interference-evidence-for-an-age-related-deficit
#15
M Karl Healey, Lynn Hasher, Karen L Campbell
Difficulty with memory retrieval is a salient feature of cognitive aging and may be related to a reduction in the ability to suppress items that compete for retrieval. To test this hypothesis directly, we presented a series of words for shallow coding that included pairs of orthographically similar words (e.g., ALLERGY and ANALOGY). After a delay, participants solved word fragments (e.g., A _ L _ _ GY) that resembled both words in a pair but could only be completed by one. We measured the consequence of having successfully resolved competition by having participants read a list of words including the rejected competitors as quickly as possible...
September 2013: Psychology and Aging
https://www.readbyqxmd.com/read/23940774/do-older-professional-musicians-have-cognitive-advantages
#16
Tarek Amer, Beste Kalender, Lynn Hasher, Sandra E Trehub, Yukwal Wong
The current study investigates whether long-term music training and practice are associated with enhancement of general cognitive abilities in late middle-aged to older adults. Professional musicians and non-musicians who were matched on age, education, vocabulary, and general health were compared on a near-transfer task involving auditory processing and on far-transfer tasks that measured spatial span and aspects of cognitive control. Musicians outperformed non-musicians on the near-transfer task, on most but not all of the far-transfer tasks, and on a composite measure of cognitive control...
2013: PloS One
https://www.readbyqxmd.com/read/23937237/hyper-binding-across-time-age-differences-in-the-effect-of-temporal-proximity-on-paired-associate-learning
#17
Karen L Campbell, Alexandra Trelle, Lynn Hasher
Older adults show hyper- (or excessive) binding effects for simultaneously and sequentially presented distraction. Here, we addressed the potential role of hyper-binding in paired-associate learning. Older and younger adults learned a list of word pairs and then received an associative recognition task in which rearranged pairs were formed from items that had originally occurred either close together or far apart in the study list. Across 3 experiments, older adults made more false alarms to near re-pairings than to far re-pairings...
January 2014: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/23593288/aging-culture-and-memory-for-socially-meaningful-item-context-associations-an-east-west-cross-cultural-comparison-study
#18
COMPARATIVE STUDY
Lixia Yang, Juan Li, Julia Spaniol, Lynn Hasher, Andrea J Wilkinson, Jing Yu, Yanan Niu
Research suggests that people in Eastern interdependent cultures process information more holistically and attend more to contextual information than do people in Western independent cultures. The current study examined the effects of culture and age on memory for socially meaningful item-context associations in 71 Canadians of Western European descent (35 young and 36 older) and 72 native Chinese citizens (36 young and 36 older). All participants completed two blocks of context memory tasks. During encoding, participants rated pictures of familiar objects...
2013: PloS One
https://www.readbyqxmd.com/read/23426890/distraction-can-reduce-age-related-forgetting
#19
Renée K Biss, K W Joan Ngo, Lynn Hasher, Karen L Campbell, Gillian Rowe
In three experiments, we assessed whether older adults' generally greater tendency to process distracting information can be used to minimize widely reported age-related differences in forgetting. Younger and older adults studied and recalled a list of words on an initial test and again on a surprise test after a 15-min delay. In the middle (Experiments 1a and 2) or at the end (Experiment 3) of the delay, participants completed a 1-back task in which half of the studied words appeared as distractors. Across all experiments, older adults reliably forgot unrepeated words; however, older adults rarely or never forgot the words that had appeared as distractors, whereas younger adults forgot words in both categories...
April 2013: Psychological Science
https://www.readbyqxmd.com/read/23286954/positive-clinical-neuroscience-explorations-in-positive-neurology
#20
REVIEW
Narinder Kapur, Jonathan Cole, Tom Manly, Indre Viskontas, Aafke Ninteman, Lynn Hasher, Alvaro Pascual-Leone
Disorders of the brain and its sensory organs have traditionally been associated with deficits in movement, perception, cognition, emotion, and behavior. It is increasingly evident, however, that positive phenomena may also occur in such conditions, with implications for the individual, science, medicine, and for society. This article provides a selective review of such positive phenomena--enhanced function after brain lesions, better-than-normal performance in people with sensory loss, creativity associated with neurological disease, and enhanced performance associated with aging...
August 2013: Neuroscientist: a Review Journal Bringing Neurobiology, Neurology and Psychiatry
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